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Early humans in China: DNA analysis points to later arrival than previously thought

It suggested that Homo sapiens were in China at least 20,000 years earlier than early modern humans had been previously believed to have left Africa and spread around the world. It also tantalizingly hinted at the possibility that a different group of early humans could have evolved separately in Asia.

Not so fast, says the science in 2021. New research published Monday has suggested perhaps we shouldn’t be so eager to rewrite the time line on human origins.

DNA analysis of two human teeth found in the same cave, called Fuyan, plus teeth and other fossilized remains from four other caves in the same region, suggested that it was unlikely early modern humans were in China so early.

“Our new research means it is very unlikely that Homo sapiens reached China before 50,000 years ago. It is always possible that our species reached the region more than 100,000 years ago, but we would have to say that there is no convincing evidence in favor of this at present,” said Darren Curnoe, an associate professor at the Australian Museum Research Institute in Sydney and coauthor of the paper that published in the journal PNAS on Monday.

The researchers were able to extract DNA from 10 human teeth and establish the age of other materials in the caves, such as charcoal and animal teeth, using a range of different methods. The team found that the teeth were at least 16,000 years old, while the other materials were less than 40,000 years old.

“The 2015 study relied heavily on the results of a single dating method which determined the age of cave materials (flowstone) lying above and below the sediments containing the human teeth,” he said via email. Flowstone is a sheetlike deposit of rock formed by flowing water.

“It is well understood that the most reliable dates come directly from the materials of interest to archaeologists, in this case, the human teeth. Our new (dates), including direct ages, are far younger than previously suggested.”

The 2015 study measured the radioactive decay of uranium within cave deposits, not DNA.

Chris Stringer, research leader for human evolution at the Natural History Museum in London, said that the dates of Chinese fossilized teeth had always stood out and it was right to investigate them further using different methods.

However, he said the study, while interesting, didn’t definitively rule out early modern humans in China before 50,000 years ago.

Complex family tree

Untangling human ancestry is a complicated business, and recent research has indicated the human family tree is much more bushy and less linear than the traditional “Out of Africa” narrative, which suggested modern humans originated in Africa and made their first successful migration to the rest of the world in a single wave between 50,000 and 70,000 years ago.

Many different ancient hominins existed and coexisted before Homo sapiens emerged as the lone survivor, and there was interbreeding between different groups of early humans.

Some of these groups — like Neanderthals — are easily identified through the fossil record and archaeological remains, but others — like the Denisovans — have been largely identified by their genetic legacy.

Maria Martinón-Torres, director of the National Research Center on Human Evolution in Spain and an author of the 2015 study, said she welcomed the new data on the early presence of modern humans in China.

However, she noted that the two teeth from Fuyan Cave were uncovered in 2019 and didn’t belong to the original sample her team studied and published in 2015.

“The precise data about the location and morphology of the sample is crucial, but it is not provided in the paper,” she said.

“I agree that we should be working in improving the dates of all sites of interest, especially with direct dating when possible. However, at the moment, there is an increasing number of samples that would support the presence of H. sapiens outside Africa before 50 ka (50,000 years ago),” she said via email.

She noted that there are other discoveries in Saudi Arabia, Israel, Sumatra and Laos, and another site in China where a jawbone has been found, that support the presence of Homo sapiens outside Africa before 50,000 years ago.

One of the main factors supporting the idea that early modern humans left Africa around 50,000 years ago is that there is a strong signal in the genes of present-day human populations.

“We would say that Out of Africa after 70,000 years ago seems to be the dominant picture. We can’t preclude earlier dispersals in other regions, but certainly southern China seems to have been settled in this Out of Africa wave after 50,000 years ago,” Curnoe said via email.

However, Martinón-Torres said this doesn’t rule out the possibility that earlier groups of Homo sapiens wandered around Asia earlier — just as groups of other early humans like Neanderthals and Denisovans did.

“We had no expectations about the dating of these fossils and sites and would have been pleased if we had confirmed an early dispersal. It would certainly have made the history of our species much older than generally believed, and perhaps more interesting,” Curnoe said.

“Sadly, this seems not to be the case, at the least for southern China, according to our work.”

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COVID-19 early response prompts Utah lawmaker to draft bill protecting religious and personal liberties

SALT LAKE CITY — In March 2020, the world seemingly shut down as state leaders rushed to keep Utahns safe from the quick-spreading and largely mysterious novel coronavirus. As part of the response, church services were limited and family members were unable to visit loved ones at health care facilities.

Nearly a year later, a state lawmaker is trying to prevent that from ever happening again with a proposed bill that he says will protect religious and personal freedoms, even in states of emergency.

Rep. Cory Maloy, R-Lehi, is the sponsor for HB184, which would block health departments from limiting religious exercise or the entry of a church. It also prohibits a health care facility from barring individuals from seeing at least one family member or spiritual advisor at a time.

“This is not to say anything negative about our health care facilities or our health care workers; I know that everyone … has worked very, very diligently to do the right things, but we just feel strongly (about) that right to be able to have those emotional connections,” Maloy said.

Taking the proper health precautions would still be permitted under the current language of the bill and facilities would be allowed “to do everything to make sure everybody’s kept safe,” Maloy said, but they will not be permitted to ban visitors altogether.

“It’s not to say we can’t do recommendations or put the right things in place to keep people safe, but just doing it without shutting those places down,” he said.

In a written statement, the Utah Department of Health said it was reviewing the bill and would address any potential concerns with Maloy.

“The Utah Department of Health has an important responsibility to respond to outbreaks of infectious disease in order to protect the health of Utah residents,” Tom Hudachko, Utah Department of Health director of communications wrote in the statement.

While the bill was inspired by the state’s COVID-19 response, Maloy said he didn’t feel any health or other public officials acted maliciously and recognized the situation was fast-moving and difficult to address; however, he said he believes it’s important to reflect on the response and see if there were areas where the state could be better in the future.

“I think it’s good for us to look at what we’ve learned through this past year,” he said.

Religious impact

While Utah hasn’t limited worship since the spring, other states have faced backlash for strict health guidelines applied to worship. The United States Supreme Court recently sided with religious groups in a dispute over COVID-19 restrictions in New York, ruling that the guidelines implemented for churches were far more restrictive than regulations enacted for similar secular businesses. Prior to the ruling, New York Gov. Andrew Cuomo revised restrictions in response to a lawsuit from religious organizations.

Utah initially restricted in-person church services but later allowed them under new guidelines issued in May. Since then, the state has largely avoided enacting orders on the religious sector of Utah.

In November, former Gov. Gary Herbert issued a new emergency order to address hospital overcrowding that banned residents from socially gathering with those who live outside of their household. Religious organizations were exempt from the order and instead were encouraged to implement the proper health protocols in their congregations to limit the spread.

Thankfully, Maloy said, Utah included its religious organizations in making key decisions about the COVID-19 response and there haven’t been any instances similar to the issues seen in New York and other states; however, he felt ensuring religious liberties even in the face of emergencies was crucial, which is why he proposed the bill as a preventative measure.

“This is a preventative measure to make sure that that never happens here in Utah,” Maloy said.

Religious groups in the state have largely followed health guidelines to limit the spread of COVID-19, outside of government orders. But Maloy said the “difference is they weren’t forced to by the government” and that they acted because “it was the right thing to do with their congregations.”

Since the onset of the pandemic, The Church of Jesus Christ of Latter-day Saints has been proactive in its response. The global church suspended in-person church service and did not immediately return to services even after local guidelines allowed for it.

Several other religious groups have implemented their own COVID-19 guidelines outside of state requirements, as well. Salt Lake’s Calvary Baptist Church, for example, closed in-person services after opening services briefly.

“I just wanted to err on the side of caution,” the Rev. Oscar Moses previously told KSL.com about his decision. “I didn’t want to take any chances with someone perhaps even contracting the virus.”

The Chabad Lubavitch of Utah also adjusted its services by implementing a hybrid system with some services conducted in person and others online to maintain public health guidelines. The congregation also hosted socially distanced Hanukkah celebrations in December.

“Whilst we are taking precautions, we are trying to be there for people in a way that makes them feel most comfortable,” Rabbi Avremi Zippel told KSL.com.

Zippel said he’s been grateful for the partnership the state has cultivated with the various religious communities in addressing pandemic response.

“That is something which we’re very grateful for here in Utah,” he said. “I know that we do not take it for granted because I know that many of my colleagues who live in other parts of the country, in larger communities, had their local governments really kind of bring the hammer down on various religious communities in what seems to be in completely arbitrary fashion.”

The state’s response to COVID-19 has largely been based around personal responsibility, with a mandatory mask mandate not implemented until several months into the pandemic.

For Zippel, he said he feels that religious leaders need to strike a balance between leading by example in times of crisis while still offering crucial religious and spiritual support.

“We need to be leading from the front; we need to be shutting down when we need to shut down,” he explained, noting that Judaism and several other religions place extreme priority on a person’s health.

On the other hand, he noted that it’s important for religious leaders to feel support from their local government for the service they provide the community.

“I think that as religious leaders, we like to feel supported and acknowledged and recognized by our local governments for the essential services that we provide to our communities,” he said. “Some people rely on their faith communities for support, for structure, for so many good things in their life, especially when everything is collapsing all around them.”

In the end, while Maloy said Utah did a great job balancing religious freedoms while still protecting the public’s health, he felt it was important to solidify those rights through law.

Protecting seniors in living facilities

Maloy’s bill would also prohibit senior living facilities from limiting family members or religious leaders from visiting residents, something that was common practice early on in the pandemic in an effort to keep residents safe from the virus.

“The reason is, oftentimes, they’re very fragile because of their age. And locking them in where they can’t have the emotional support system from their spiritual leaders or their family is just something we don’t want to see,” Maloy said. “It’s meant to be preventative to protect those rights, and we have seen instances in Utah where seniors — especially seniors — were away from their family members or spiritual leaders for months at a time, and we just feel like that’s just too much of an infringement.”

Jenny Allred, who went several months without seeing her 95-year-old grandmother, said the bill is extremely important and is something that “absolutely needs to happen.”

“The health department was focusing so much on the aspect of keeping physically safe — which absolutely needs to happen — however, there’s another very important component to that health that goes hand in hand, and that’s mental and emotional health,” she said. “So I think this will help kind of find a balance between that.”

As the facility Allred’s grandmother resides in reacted to COVID-19 cases in the community, the family’s contact with the 95-year-old declined and the family was “very worrisome because we couldn’t get ahold of her.”

Eventually, the family was able to get her an Alexa machine that helped them communicate, but they were still unable, at times, to contact her. In-person visits were also limited, allowed to happen only through a glass window. Her grandmother contracted COVID-19 at one point and Allred and other family members struggled to get in contact with her for health updates since the facility was overwhelmed and short-staffed. Fortunately, her grandmother has since recovered.

“I think when you’re going through those things, to even be able to see her in person and be able to have that connection, let her know things are going to be OK, be able to provide that love, and for her to be able to feel that and see that in person, I think speaks volumes,” Allred said.

Maloy agreed and said that was his entire idea behind the bill: preventing seniors from becoming isolated during a disaster.

“They can still be able to take precautions to do everything to make sure everybody’s kept safe, (but) they will not be able to just say, ‘No, you can’t have visitors coming in,'” Maloy said.

Lauren Bennett

More stories you may be interested in

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Apex Legends Season 8 early patch notes: Legends buffs, bug fixes, more

Apex Legends Season 8: Mayhem update is due to drop on February 2, and although patch notes aren’t expected until right before the update goes live, we already know of a bunch of confirmed changes and fixes coming. Here’s an early look at what the patch notes are expected to include.

Obviously, the main changes will be the addition of the new Legend, Fuse, who hails from Salvo, as well as the new weapon – the 30-30 repeater.

Kings Canyon will also be massively changed, as Fuse’s entrance to the Apex games did not go smoothly and his old friend Maggie crashed the party – literally.

But, the most exciting part of the patch notes themselves will be seeing how Respawn has adjusted the various Legends with nerfs and buffs, plus some of the quality of life changes planned.

Apex Legends Season 8: Early patch notes

New Legend: Fuse

Straight from Salvo, Fuse is an explosive Legend, and his abilities reflect this. He can shoot projectiles from his prosthetic arm, and his ultimate will shoot a mortar-like missile, which explodes into a ring of fire.

Fuse Abilities:

  • Passive: Grenadier – Fuse’s mechanical arm throws ordnances farther, faster and more accurately. Fuse can also stack more grenades per inventory slot than other Legends.
  • Tactical: Knuckle Cluster – Deploy a cluster bomb that splinters out mini-concussion mines.
  • Ultimate: The Motherlode – Bring out Fuse’s rocket launcher “Wally” to drop an ordnance that surrounds the target in a ring of flames.
Respawn Entertainment

Official icons and descriptions for Fuse’s abilities.

New Weapon: 30-30 Repeater

We didn’t get a new weapon in Season 7, but we are in Season 8. Fuse brings the 30-30 repeater straight from Salvo. It’s a lever-action rifle that packs a punch.

It uses the Heavy Ammo type, but shots can be charged too.

Respawn Entertainment

The 30-30 Repeater will be added to the loot pool this February.

Kings Canyon map changes

The arrival of Fuse has obliterated Kings Canyon. Original POIs including Slum Lakes and Artillery have been destroyed, and there is a new hue to the map.

Respawn Entertainment

A massive explosion on Kings Canyon has completely changed the map.

New Season 8 Battle Pass: Mayhem

As always, there will be a fresh battle pass for the new season, which will include over 100 items.

We don’t know if there will be any changes to the battle pass system yet, like there was in Season 7.

Legend changes

These are the Legend buffs and nerfs that Respawn have said will be coming in Season 8. Check out a full explanation and details on each change here.

Note: This is not a final list of all Legends that are getting changes in the Season 8 update.

Rampart

  • Adding 45 health to her Amped Cover

Wraith

  • Respawn say they are looking at changes to Wraith’s hitbox, to bring her in line with other Legends.

Horizon

  • Respawn are looking at nerfs to her tactical ability, but haven’t confirmed the exact changes they’re making yet.

Revenant

  • Respawn have been struggling to find a good buff for Revenant, but are looking at hitbox adjustments

Wattson

  • Respawn are looking for ways to make Wattson more fun, without making her more powerful

Mirage

  • Fix for decoys making footstep noise – this was originally in the Fight Night patch notes, but has been removed and will be coming in a future update, possibly with Season 8.

Caustic

  • Caustic hammer breaking doors – this was also originally in the Fight Night patch notes, but has been removed and will be coming in a future patch, possibly with Season 8.
Respawn Entertainment

Horizon is due for a slight nerf in Season 8.

New Item: Gold Magazines

  • Gold Magazines: Automatically reloads holstered weapons, has a 5.5 second delay.
  • New hop-up for the Sentinel – unknown

Returning Items

Not confirmed yet, but it appears the Anvil Receiver hop up will be back in Season 8.

Quality of Life

  • In-game damage tracker added

Bug Fixes

  • Heirloom store not showing all Heirlooms
  • Players told they are buying Gibraltar’s Heirloom when buying Caustic’s Heirloom
  • Legend skins for Mirage and Bangalore affecting aim down sights
  • Errors relating to private matches
  • Players can’t hear each other in cross-play lobbies

Ranked Play

A new Ranked Series will begin at the start of Season 8: Ranked Series 7. The first split will take place on Kings Canyon, and run until March 23. The Second split will be on Olympus. No World’s Edge in Ranked play.

Full Ranked Play changes can be seen here.

  • Earn placement RP earlier in a match
    • RP rewards begin at placement 13 instead of 10 in a match.
  • Kill/Assist count has been raised to 6
    • Earn RP for more of your kills and assists in a given match.
    • This is a slight nudge to give really good players a slightly faster trip back to their competitive rank, while giving our top tier players more ways to pull ahead of the pack in the Predator ranks.
  • Assist Threshold Increased to 10 seconds
    • Earn assists for up to 10 seconds (up from 7.5 seconds) after dealing damage to a target that is killed by someone else.
  • Predator has been increased to the top 750 players
    • Allowing more players to enter predator should improve queue times while remaining an exclusive tier for the highest levels of play.
  • Matchmaking Tightening
    • Players below Diamond will matchmake much more often within their own Ranks.
  • Skydive Trails return
    • In Season 8, Diamond Skydive Trails will be making a return as a ranked reward.

Season 8 Collection Event

Data miners have uncovered files related to an Anniversary Collection Event in Season 8. Although collection events typically start midway through the Season, this time it could potentially start earlier, given that the 2-year anniversary of Apex Legends is February 4 – two days after Season 8 starts.


That’s everything we know at the moment about what’s coming in the Season 8 update patch notes.

We’ll keep you updated with more changes as they come, and of course when Respawn releases the full patch notes.

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US children will ‘hopefully’ get vaccines in late spring or early summer, says Fauci | US news

Children in the US will “hopefully” start to be vaccinated against Covid-19 by late spring or early summer, Dr Anthony Fauci said on Friday.

Joe Biden’s chief medical adviser, the head of the National Institute for Allergies and Infectious Diseases, was speaking at a White House coronavirus briefing, an event reinstituted by the new president after falling away during the last months of the Trump administration.

“Hopefully by the time we get to the late spring and early summer we will have children being able to be vaccinated,” Fauci said.

Covid-19 vaccines are not yet approved for children. Supplies for adults and the logistics of providing shots are proving steep challenges for manufacturers, the administration and state governments. As of Thursday, only about 1.3% of Americans had received the required two doses of currently available vaccines.

But vaccination of children is a key step in the pursuit of widespread immunity to a virus that has infected nearly 26 million in the US and killed more than 433,000. For the US to reach “herd immunity”, or widespread resistance, about 70% to 85% of the population must be vaccinated. Children make up about 25% of the population.

“Children tend to not become as severely ill as adults [from Covid-19] but they can still become ill and some have tragically died,” Dr Leana Wen, a public health expert, told the Associated Press. “Children can also be vectors of transmission, and getting children vaccinated is important.”

The federal Food and Drug Administration has not yet approved vaccines for children, due to insufficient testing data. Fauci said data was being gathered through a process called “age de-escalation testing”. The Pfizer/BioNTech vaccine received emergency approval for use in people 16 and older. The next step, Fauci said, involves testing in children down to 12. If successful it will be followed by another round of testing, down to nine years old.

Since initial tests to validate the safety and effectiveness of the Pfizer and Moderna vaccines involved tens of thousands of people, age-related testing on children can be done using smaller groups.

“You don’t want to have to … go through an efficacy trial, where you’re involving tens of thousands of children,” said Fauci. “What you can do, is in a much smaller trial, measured in hundreds to a couple of thousands … what we call safety and … immunogenicity.”

That is a term for whether the vaccine successfully triggers an immune system response.

After a frustratingly slow start, the US is administering about 1m shots a day to adults, although the pace is still seen as insufficient. Biden’s administration has set a goal of 100m shots in its first 100 days and the president has talked about achieving 1.5m shots a day.

“We’re going to make sure everybody has enough,” Biden said on Friday, visiting veterans in hospital near Washington. “We’re going to get the supply up, nationwide.”

Two more vaccines from US companies are nearing FDA approval. One from Johnson & Johnson requires a single shot.

Biden has also set a goal of reopening most schools by the summer, and directed government agencies to work with communities to advance it.

His American Rescue Plan legislation in Congress calls for $50bn to finance a major expansion of testing, which is seen as necessary for the safe reopening of schools and businesses. Robust testing can detect outbreaks before they spread and trigger shutdowns. Under Donald Trump, testing in the US had a chaotic start. Experts say in many parts of the country it is still subpar.

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Apple’s App Tracking Transparency feature will be enabled by default and arrive in ‘early spring’ on iOS – TechCrunch

Apple has shared a few more details about its much-discussed privacy changes in iOS 14. The company first announced at WWDC in June that app developers would have to ask users for permission in order to track and share their IDFA identifier for cross-property ad targeting purposes. While iOS 14 launched in the fall, Apple delayed the tracking restrictions until 2021, saying it wanted to give developers more time to make the necessary changes.

Now we’ve got a slightly-more-specific timeline. The plan is to launch these changes in early spring, with a version of the feature coming in the next iOS 14 beta release.

This is how Apple describes the new system: “Under Settings, users will be able to see which apps have requested permission to track, and make changes as they see fit. This requirement will roll out broadly in early spring with an upcoming release of iOS 14, iPadOS 14, and tvOS 14, and has already garnered support from privacy advocates around the world.”

And here are the basics of what you need to know:

  • The App Tracking Transparency feature moves from the old method where you had to opt-out of sharing your Identifier for Advertisers (IDFA) to an opt-in model. This means that every app will have to ask you up front whether it is ok for them to share your IDFA with third parties including networks or data brokers.
  • The feature’s most prominent evidence is a notification on launch of a new app that will explain what the tracker will be used for and ask you to opt-in to it.
  • You can now toggle IDFA sharing on a by-app basis at any time, where previously it was a single toggle. If you turn off the “Allow apps to request to track” setting altogether no apps can even ask you to use tracking.
  • Apple will enforce this for all third-party data sources including data sharing agreements, but of course platforms can still use first party data for advertising as per their terms of service.
  • Apple expects developers to understand whether APIs or SDKs that they use in their apps are serving user data up to brokers or other networks and to enable the notification if so.
  • Apple will abide by the rules for its own apps as well and will present the dialog and follow the ‘allow apps to request’ toggle if its apps use tracking (most do not at this point).
  • One important note here is that the Personalized Ads toggle is a separate setting that specifically allows or does not allow Apple itself to use its own first party data to serve you ads. So that is an additional layer of opt-out that affects Apple data only.

Apple is also increasing the capabilities of its Ad attribution API, allowing for better click measurement, measurement of video conversions and also — and this is a big one for some cases, app-to-web conversions.

This news comes on Data Privacy Day, with CEO Tim Cook speaking on the issue this morning at the Computers, Privacy and Data Protection conference in Brussels. The company is also sharing a new report showing that the average app has six third-party trackers.

While this seems like a welcome change from a privacy perspective, it’s drawn some criticism from the ad industry, with Facebook launching a PR campaign emphasizing the impact on small businesses, while also pointing to the change as “one of the more significant advertising headwinds” that it could face this year. Apple’s stance is that this provides a user-centric data privacy approach, rather than an advertiser-centric one.

 

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5 Early Predictions for the 2021 NBA Trade Deadline | Bleacher Report

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    Brett Davis/Associated Press

    The 2021 NBA trade deadline is now less than two months away, although a blockbuster four-team James Harden trade has already caused ripples throughout the league.

    Harden joining the Brooklyn Nets means other title contenders may now be pressured to upgrade their rosters while the Nets themselves look to build back some depth.

    Bradley Beal has become the name to watch as the league’s leading scorer is being wasted on the 3-9 Washington Wizards. He’s far from the only big name who could be moved, however.

    With activity already underway, here are some more transactions to look out for as the deadline draws closer.

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    Tony Dejak/Associated Press

    Pairing James Harden with Kevin Durant and Kyrie Irving seems like a cheat code on offense, although stripping the team of Jarrett Allen, Taurean Prince and Caris LeVert has severely hurt Brooklyn’s defense and depth.

    Since trading for Harden, the Nets have a defensive rating of 119.2, which ranks next-to-last in the NBA over that span.

    While one of those meetings was against a strong Milwaukee Bucks team, the Nets dropped two games to the Cleveland Cavaliers (who were missing Kevin Love), gave up 124 points to a Miami Heat squad without Jimmy Butler or Tyler Herro and allowed Nikola Vucevic of the Orlando Magic to light them up for 34 points on 63.6 percent shooting.

    Starting center DeAndre Jordan (5.8 points and 6.8 rebounds per game) hasn’t been this ineffective in nearly a decade and will get destroyed if he’s asked to defend Joel Embiid, Bam Adebayo or Giannis Antetokounmpo in a playoff series.

    The Nets can’t trade a first-round pick for the next eight drafts, which means they’re limited on upgrade opportunities.

    But JaVale McGee is one option. The 33-year-old is averaging 8.2 points, 6.2 rebounds and 1.1 blocks in just 16.8 minutes per game for the Cavaliers but has fallen out of the rotation behind Andre Drummond and Allen.

    The Nets were granted a $5.7 million disabled player exception from Spencer Dinwiddie’s season-ending ACL tear, and they could use it to absorb McGee’s $4.2 million salary. Sam Amico of FortyEightMinutes reported that the Nets and Cavs have already met twice to discuss a trade for the big man.

    Brooklyn could also use its exception to trade for fellow veteran centers like Ed Davis, Nerlens Noel or Bismack Biyombo.

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    Eric Gay/Associated Press

    With the Houston Rockets in the middle of a complete makeover, P.J. Tucker is likely the next veteran out the door.

    Houston hasn’t been in any hurry to trade the 35-year-old, however, even offering him a contract extension, per The Athletic’s Kelly Iko and Sam Amick. They also noted that “teams have already made a number of phone calls to Houston about potentially acquiring Tucker.”

    The three-and-D power forward with an expiring $8 million contract should be one of the league’s easiest veterans to move. He’s played a key role on playoff teams in Houston and Toronto the past five years, able to start as a floor-stretching big or serve as a primary reserve.

    Since Tucker has refused to sign any extension Houston has offered, a trade seems inevitable.

    The Minnesota Timberwolves have “maintained contact” with the Rockets about Tucker, per The Athletic’s Jon Krawczynski. While they have a need at power forward, they’re also dead last in the West with a 4-11 record. Giving up anything of value for Tucker with the season slipping away seems questionable.

    Expect a contender to end up winning the Tucker sweepstakes instead.

    The Boston Celtics have needed a true power forward for years. The Brooklyn Nets, Portland Trail Blazers and Denver Nuggets all need defensive help, as well.

    With Russell Westbrook and James Harden both out of Houston, expect Tucker to be next.

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    Rick Scuteri/Associated Press

    The Dallas Mavericks are good enough to make a deep playoff run now but should also be closely monitoring the 2021 free-agent class.

    With Kristaps Porzingis on a max deal and Luka Doncic eligible to sign his own extension this offseason, the Mavs’ last chance to make a big splash in free agency may be this summer.

    While some of the top potential free agents have already inked extensions that have taken them off the table, plenty of talent will still be available. Victor Oladipo, DeMar DeRozan, John Collins, Lauri Markkanen, Kyle Lowry and Andre Drummond will all be free agents, and each could help create a Big Three in Dallas.

    The Mavericks aren’t guaranteed to have space for a max salary yet, however.

    Josh Richardson carries an $11.6 million player option, and the Mavericks can choose whether they want to pay Willie Cauley-Stein $4.1 million next season.

    Dallas should be looking for roster upgrades now while getting some extra salary off the books for 2021-22.

    Drummond is on an expiring $28.8 million deal and should be available after the Cleveland Cavaliers traded for Jarrett Allen. The Mavs could build a deal around James Johnson and Dwight Powell, thereby removing the latter’s remaining two years and $22.8 million. Dallas is just 24th in rebounding this season (48.4 rebound percentage), while Drummond is nearly leading the NBA in glass-cleaning for the fourth consecutive season.

    Otto Porter Jr. ($28.5 million) and LaMarcus Aldridge ($24.0 million) could also work as pieces on expiring deals who are capable of helping now.

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    Charles Rex Arbogast/Associated Press

    While a handful of young players (Jayson Tatum, Donovan Mitchell, Bam Adebayo, De’Aaron Fox, OG Anunoby, etc.) avoided free agency by signing extensions before the season, other young stars failed to come to an agreement with their current clubs.

    John Collins, Lauri Markkanen and Lonzo Ball will now become restricted free agents over the summer, leaving their futures with their current teams in doubt.

    Jarrett Allen was another player from the 2017 class who wasn’t extended. By not signing any additional contract with the Brooklyn Nets, he was eligible to be traded as part of the James Harden deal and will almost certainly re-up with the Cleveland Cavaliers. The Nets are already deep into the luxury tax, so a new deal for Allen would have put even more financial pressure on the franchise.

    A difference in money is likely the reason Collins, Markkanen and Ball aren’t under long-term deals, as well. It could also be the reason at least one of them gets traded before the deadline.

    John Collins wanted max money from the Atlanta Hawks but only got an offer in excess of $90 million, per ESPN’s Brian Windhorst. The Chicago Bulls and Markkanen were about $4 million apart in starting salary numbers, per K.C. Johnson of NBC Sports Chicago. Ball probably should have taken whatever reasonable offer the New Orleans Pelicans presented to him given his huge dip in play from last season.

    While Ball and Markkanen could still be moved, Collins seems like the most likely candidate.

    As a combo big, Collins is facing a crowded Hawks frontcourt with Clint Capela, Danilo Gallinari, Onyeka Okongwu and De’Andre Hunter, who’s passed Collins as the team’s second-leading scorer behind Trae Young.

    Since the Hawks might need to give the 23-year-old a max deal or lose him for nothing this offseason, expect him to be traded—and possibly Markkanen or Ball, as well.

5 of 5

    Andy Clayton-King/Associated Press

    A 6-9 record to start the season has the Miami Heat near the bottom of the Eastern Conference, in large part because of injuries and players missing games due to health and safety protocols related to COVID-19.

    While it’s still relatively early, the East is becoming far tougher than the version Miami finished on top of last campaign.

    The Philadelphia 76ers are off to a 12-5 start to lead the conference, the Brooklyn Nets could now have the NBA’s top offense with James Harden, and the Milwaukee Bucks should be better suited for the postseason with Jrue Holiday aboard.

    Miami should certainly feel pressure to do something, and a trade for Bradley Beal would be the ultimate response.

    The Miami Herald‘s Barry Jackson noted the Heat have a “high” interest level in trading for Beal should the 3-9 Washington Wizards make him available.

    While Jimmy Butler and Bam Adebayo would be off the table, a deal centered around Tyler Herro, Duncan Robinson and first-round picks in 2025 and 2027 should be enough to get Washington’s interest. Miami should be going all-in to win a title, especially since the 31-year-old Butler racked up a lot of early-career mileage while playing under Tom Thibodeau on the Chicago Bulls.

    The Wizards won’t want to trade Beal, but the 27-year-old could certainly ask his way out. With a 21-year-old star in the making likely on the table in Herro, they could get a nice return for their established star.



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US stock futures recovering from negative territory early Tuesday

NEW YORK — U.S. equity futures were recovering from negative territory Tuesday hours before the opening bell after finishing mixed Monday as a deluge of corporate earnings reports were scheduled to arrive this week.

Ticker Security Last Change Change %
I:DJI DOW JONES AVERAGES 30960 -36.98 -0.12%
SP500 S&P 500 3855.36 +13.89 +0.36%
I:COMP NASDAQ COMPOSITE INDEX 13635.991758 +92.93 +0.69%

The S&P 500 rose 0.4% to 3,855.36 as gains for influential Big Tech stocks offset losses for most companies. The Dow Jones Industrial Average dipped 0.1% to 30,960.00. The Nasdaq composite, which is packed with tech stocks, rose 0.7% to 13,635.99 and another record.

PELOSI’S HUSBAND BETS UP TO $1M TESLA WILL FLOURISH DURING BIDEN’S ADMINISTRATION

The Russell 2000 index of smaller stocks fell 0.3%, to 2,163.27. The yield on the 10-year Treasury sank to 1.03% from 1.07% late Friday.

Besides Apple, more than 100 companies in the S&P 500 are scheduled to tell investors this week how they fared during the last three months of 2020. They include American Express, Johnson & Johnson, 3M, AT&T and Tesla.

U.S. equity futures were recovering from negative territory Tuesday hours before the opening bell after finishing mixed Monday as a deluge of corporate earnings reports were scheduled to arrive this week. (Colin Ziemer/New York Stock Exchange via AP)

As a whole, analysts expect S&P 500 companies to say their fourth-quarter profit fell 5% from a year earlier. That’s a milder drop than the 9.4% they were forecasting earlier this month, according to FactSet.

President Joe Biden has proposed a $1.9 trillion plan to send $1,400 to most Americans and deliver other support for the economy. But his party holds only the slimmest possible majority in the Senate, making approval uncertain. Several Republicans have already voiced opposition to parts of the plan.

The coronavirus pandemic is also worsening and doing more damage by the day. A UN agency said Monday that four times as many jobs were lost last year as in 2009, during the global financial crisis.

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The Federal Reserve will begin a two-day meeting on interest-rate policy Tuesday, and the wide expectation is for it to keep the accelerator floored on its stimulus for the economy and markets. It has said it plans to keep interest rates low even if inflation rises above its 2% target.

Meanwhile, traders are keeping a wary eye on rising coronavirus infections in various countries and a bumpy rollout of vaccinations in the U.S. The spread of variants that are thought to be more easily transmissible and might be less effectively targeted by existing vaccines is adding to alarm.

Vaccine maker Moderna said Monday that it will study whether a booster shot would be needed to protect against variants of the coronavirus, “out of an abundance of caution.”

“Nowadays the market mood is set by either the hopes that the COVID vaccine would mark the end of the biggest economic downturn of our lifetime, or the stimulus hopes to keep our heads above water. Yesterday, both hopes got smashed,” Ipek Ozkardeskaya, a senior analyst at Swissquote Bank, said in a commentary.

Meanwhile, Japan’s Nikkei 225 index declined 1% to 28,546.18, while the Shanghai Composite index dropped 1.5% to 3,569.43. South Korea’s Kospi lost 2.1% to 3,140.31. Shares also fell in Southeast Asia.

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Markets in Australia and India were closed for holidays.

In other Tuesday trading, U.S. benchmark crude oil lost 37 cents to $52.40 per barrel in electronic trading on the New York Mercantile Exchange. It gained 50 cents to $52.77 per barrel on Monday.

Brent crude, the international standard, shed 40 cents to $55.28 per barrel.

The U.S. dollar slipped to 103.74 Japanese yen from 103.76 yen late Monday. The euro dropped to $1.2129 from $1.2141.

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NBA, players’ union discuss possible All-Star Game in early March, sources say

The NBA and the National Basketball Players Association are discussing the possibility of holding an All-Star Game in early March — with Atlanta emerging as the likely site, sources tell ESPN.

The traditional All-Star Weekend — previously scheduled for Indianapolis in February — was canceled because of the ongoing coronavirus pandemic, but sources tell ESPN there are ongoing talks with the league and union about a March 7 game in Atlanta that would be a far-scaled-down version of the typical All-Star Weekend festivities, sources said.

The NBA has a midseason break set for March 5-10.

NBPA president Chris Paul of the Phoenix Suns has been a proponent of the idea, which would include the showcasing and benefiting of historically Black colleges and universities and COVID-19 relief funds, sources said. Both the Atlanta Hawks’ State Farm Arena and Atlanta-based HBCU campus gyms are under consideration to house a potential game, sources said.

Atlanta is the home of Turner Sports, which could televise the game without its crew having to travel outside the city. Even a game without fans — or with sparse, socially distanced attendance — would still require significant travel for players, support staff and league officials in the teeth of the pandemic. The typical hosting of corporate sponsors, a significant financial component of normal All-Star Weekends, wouldn’t be possible.

Talks are centered on a stripped-down All-Star Game scenario that would largely be focused on the game — with little in the way of fan-related experiences, if any, surrounding it, sources said.

The NBA has postponed 21 regular-season games that will need to be made up this season. The NBA awarded Indianapolis the 2024 All-Star Weekend to replace the loss of the event in 2021.

ESPN’s Brian Windhorst contributed to this report.

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How many early human species existed on Earth?

We Homo sapiens didn’t used to be alone. Long ago, there was a lot more human diversity; Homo sapiens lived alongside an estimated eight now-extinct species of human about 300,000 years ago. As recently as 15,000 years ago, we were sharing caves with another human species known as the Denisovans. And fossilized remains indicate an even higher number of early human species once populated Earth before our species came along.

“We have one human species right now, and historically, that’s really weird,” said Nick Longrich, an evolutionary biologist at the University of Bath in the United Kingdom. “Not that far back, we weren’t that special, but now we’re the only ones left.”

So, how many early human species were there? 

Related: What’s the first species humans drove to extinction?

When it comes to figuring out exactly how many distinct species of humans existed, it gets complicated pretty quickly, especially because researchers keep unearthing new fossils that end up being totally separate and previously unknown species.  

“The number is mounting, and it’ll vary depending on whom you talk to,” said John Stewart, an evolutionary paleoecologist at Bournemouth University in the United Kingdom. Some researchers argue that the species known as Homo erectus is in fact made up of several different species, including Homo georgicus and Homo ergaster.

“It’s all about the definition of a species and the degree to which you accept variation within a species,” Stewart told Live Science. “It can become a slightly irritating and pedantic discussion, because everyone wants an answer. But the truth is that it really does depend.”

What is a species?

The definition of a species used to be nice and simple: If two individuals could produce fertile offspring, they were from the same species. For example, a horse and a donkey can mate to produce a mule, but mules can’t successfully reproduce with each other. Therefore, horses and donkeys, though biologically similar, are not the same species. In recent decades, however, that simplicity has given way to a more complex scientific debate about how to define a species. Critics of the interbreeding definition point out that not all life reproduces sexually; some plants and bacteria can reproduce asexually. 

Others have argued that we should define species by grouping together organisms with similar anatomical features, but that method has weaknesses as well. There can be significant morphological variation between the sexes and even individuals of the same species in different parts of the world, making it a very subjective way of classifying life. 

Some biologists prefer to use DNA to draw the lines between species, and with advancing technology, they can do so with increasing precision. But we don’t have the DNA of every ancient human — the genome of Homo erectus, for instance, has never been sequenced, Live Science previously reported

The skulls of various human species  (Image credit: Shutterstock)

It gets even murkier when you consider that as much as 2% of the average European’s DNA comes from Neanderthals and up to 6% of the DNA of some Melanesians (Indigenous people from islands directly northeast of Australia in Oceania) comes from Denisovans. So, are we a separate species from these ancestors? 

“Some people will tell you that Neanderthals are the same species as us,” Stewart said. “They’re just a slightly different type of modern humans and the interbreeding is the proof, but again the definition of species has moved on from just interbreeding.”

Related: Why haven’t all primates evolved into humans?

After taking all of this into account, some experts have argued that the concept of a species doesn’t actually exist. But others say that, while a cast-iron definition of a species is almost impossible to achieve, it’s still worth the effort so that we can talk about evolution — including the evolution of our own species — in a meaningful way. 

So we muddle on, knowing that a species means different things to different people — which means, of course, that people will disagree on how many species of human have ever existed. It’s also a question of what constitutes a human. To answer this question, it helps to understand the word hominin, a large group that includes humans and chimps going back to their shared ancestor.

“The chimpanzee and us have evolved from a common ancestor,” Stewart said. If we decide that humans are everything that arrived after our split from ancient chimpanzees about 6 million to 7 million years ago, then it’s likely to be a diverse group. The Smithsonian National Museum of Natural History has listed at least 21 human species that are recognized by most scientists. Granted, it’s not a totally complete list; the Denisovans, for instance, are missing. 

Those on the list include Homo sapiens, Neanderthals, the Indonesian hobbit-size people, Homo erectus and Homo naledi. The list also includes other species that existed closer in time to the common ancestor of humans and chimps, and so look more like chimpanzees than modern-day humans. Despite their looks, these species are still known as early humans. “You can’t go back 5 million years and expect them to look like us,” Stewart said.

If the Smithsonian says there are 21, then you can be sure the diversity is much greater, Stewart said. That’s because the list errs on the side of caution, picking the species that are close to universally recognized. For instance, the recently discovered dwarf human species Homo luzonensis, who is known from just a few bones unearthed in an Indonesian cave, is not included on the Smithsonian’s list.

Researchers also suspect there are many other fossilized species yet to be excavated. “The list has only ever grown and I don’t see why that will change,” Stewart said.

Originally published on Live Science.

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