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MOSCOW (AP) — Russian aircraft makers say they will present a prospective new fighter jet at a Moscow air show that opens next week.

The new warplane hidden under tarpaulin was photographed being towed to a parking spot across an airfield in Zhukovsky, outside Moscow, where the MAKS-2021 International Aviation and Space Salon opens Tuesday. Russian President Vladimir Putin is set to visit the show’s opening.

Russian media reports said that the new jet has been built by the Sukhoi aircraft maker in a program of development of a light tactical fighter.

Unlike Russia’s latest Su-57 two-engine stealth fighter, the new aircraft is smaller and has one engine.

The Su-57 has been built to match the U.S. F-22 Raptor stealth fighter, but unlike the American aicraft that has been in service since 2005 its serial production is just starting and a new engine intended to give it the capability to cruise at supersonic speed is still under development.

The new warplane’s name is unknown, and there is no information about its capability and deployment prospects.

The prospective Russian fighter jet appears intended to compete with the U.S. F-35 Lightning II fighter, which entered service in 2015. Russia hopes to eventually offer the new aircraft to foreign customers.

Rostec, the state corporation that includes Russian aircraft makers, said the “fundamentally new military aircraft” will be unveiled Tuesday at the Moscow air show. “Russia is one of the few countries in the world with full-cycle capacities for producing advanced aircraft systems, as well as a recognized trendsetter in the creation of combat aircraft,” it said.

Following the Rostec announcement, Russian plane spotters rushed to Zhukovsky to take pictures of the new plane — an eerie parallel with Cold War times when Western spies tried to get a glimpse of the latest Soviet warplanes at the tightly-guarded airfield that served as the country’s top military aircraft test facility.

In a bid to raise public interest before the presentation, Rostec published a picture of the new plane covered by tarpaulin with “wanna see me naked?” written under it. It also posted a brief video featuring excited foreign customers and the jet’s vague shadow over the water.

Another teaser photo posted on Rostec’s Facebook account Saturday showed what appeared to be a reflection of a British type 45 destroyer in the new Russian warplane’s optical sensor with an inscription “See you.” “Black tarpaulin looks enticing, but details are always more interesting,” Rostec said.

A British type 45 destroyer, HMS Defender, was involved in the June 23 incident in the Black Sea when Russia said one of its warships fired warning shots and a warplane dropped bombs in the path of the Defender to chase it away from an area near Crimea that Moscow claims as its territorial waters. Britain, which like most other nations didn’t recognize Russia’s 2014 annexation of Crimea, insisted the Defender wasn’t fired upon and said it was sailing in Ukrainian waters.

Putin has charged that the incident with the Defender wouldn’t have triggered a global conflict even if Russia had sunk the British vessel because the West knows it can’t win such a war, a bold statement that appeared to indicate his resolve to raise the stakes should a similar incident happen again.

The Kremlin has made modernization of the country’s armed forces a top priority amid a bitter strain in relations with the West, which have sunk to post-Cold War lows after Moscow’s 2014 annexation of Ukraine’s Crimean Peninsula, accusations of Russian interference in elections, hacking attacks and other irritants.

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WASHINGTON (AP) — What makes humans unique? Scientists have taken another step toward solving an enduring mystery with a new tool that may allow for more precise comparisons between the DNA of modern humans and that of our extinct ancestors.

Just 7% of our genome is uniquely shared with other humans, and not shared by other early ancestors, according to a study published Friday in the journal Science Advances.

“That’s a pretty small percentage,” said Nathan Schaefer, a University of California computational biologist and co-author of the new paper. “This kind of finding is why scientists are turning away from thinking that we humans are so vastly different from Neanderthals.”

The research draws upon DNA extracted from fossil remains of now-extinct Neanderthals and Denisovans dating back to around 40,000 or 50,000 years ago, as well as from 279 modern people from around the world.

Scientists already know that modern people share some DNA with Neanderthals, but different people share different parts of the genome. One goal of the new research was to identify the genes that are exclusive to modern humans.

It’s a difficult statistical problem, and the researchers “developed a valuable tool that takes account of missing data in the ancient genomes,” said John Hawks, a paleoanthropologist at the University of Wisconsin, Madison, who was not involved in the research.

The researchers also found that an even smaller fraction of our genome — just 1.5% — is both unique to our species and shared among all people alive today. Those slivers of DNA may hold the most significant clues as to what truly distinguishes modern human beings.

“We can tell those regions of the genome are highly enriched for genes that have to do with neural development and brain function,” said University of California, Santa Cruz computational biologist Richard Green, a co-author of the paper.

In 2010, Green helped produce the first draft sequence of a Neanderthal genome. Four years later, geneticist Joshua Akey co-authored a paper showing that modern humans carry some remnants of Neanderthal DNA. Since then, scientists have continued to refine techniques to extract and analyze genetic material from fossils.

“Better tools allow us to ask increasingly more detailed questions about human history and evolution,” said Akey, who is now at Princeton and was not involved in the new research. He praised the methodology of the new study.

However, Alan Templeton, a population geneticist at Washington University in St Louis, questioned the authors’ assumption that changes in the human genome are randomly distributed, rather than clustered around certain hotspots within the genome.

The findings underscore “that we’re actually a very young species,” said Akey. “Not that long ago, we shared the planet with other human lineages.”

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Follow Christina Larson on Twitter: @larsonchristina

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The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Department of Science Education. The AP is solely responsible for all content.

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