Reuters Science News Summary

To prepare for atmospheric re-entry and return to Earth, the SpaceX Crew Dragon vehicle completed two rocket "burns" on Friday to lower its altitude and line up the capsule's trajectory with the targeted landing site. Study rewrites understanding of modern Japan's genetic ancestry An analysis of ancient DNA is transforming the understanding of the genetic ancestry of Japan's modern-day population, identifying a crucial contribution from people who arrived about 1,700 years ago and helped revolutionize Japanese culture.

Following is a summary of current science news briefs.

Chinese astronauts return after 90-day mission to space station

Three Chinese astronauts returned to earth on Friday after a 90-day visit to an unfinished space station in the country's first crewed mission since 2016. In a small return capsule, the three men - Nie Haisheng, Liu Boming and Tang Hongbo - landed safely in the autonomous region of Inner Mongolia in the north of China at 1:34 p.m. (0534 GMT), state media reported.

A ukulele in space? Inspiration4 crew shows a playful side in orbit

A 42-year-old data engineer on the first all-civilian astronaut crew to reach orbit made some spaceflight history on Friday, with a zero-gravity ukulele performance in a SpaceX capsule hundreds of miles above Earth's surface. Chris Sembroski, a Lockheed Martin employee and U.S. Air Force veteran, strummed a few chords for home-bound viewers during a 10-minute show-and-tell session by the four-member Inspiration4 team as they flew at about 17,500 miles per hour (28,000 km per hour) over Europe.

As workers age, robots take on more jobs -study

It turns out robots are taking over jobs fastest around the world in places where their human counterparts are aging the most rapidly. That is the conclusion of a new study that looked at demographic and industry-level data in 60 countries and found a powerful link between aging workforces - defined as the ratio of workers aged 56 and older, compared with those aged 21 to 55 - and robot use, focusing in particular on industrial settings.

SpaceX capsule with world's first all-civilian orbital crew set for splashdown

The quartet of newly minted citizen astronauts comprising the SpaceX Inspiration4 mission were due to splash down in the Atlantic off Florida on Saturday, completing a three-day flight of the first all-civilian crew ever launched into Earth orbit. To prepare for atmospheric re-entry and return to Earth, the SpaceX Crew Dragon vehicle completed two rocket "burns" on Friday to lower its altitude and line up the capsule's trajectory with the targeted landing site.

Study rewrites understanding of modern Japan's genetic ancestry

An analysis of ancient DNA is transforming the understanding of the genetic ancestry of Japan's modern-day population, identifying a crucial contribution from people who arrived about 1,700 years ago and helped revolutionize Japanese culture. Research published on Friday showed that the people of Japan bear genetic signatures from three ancient populations rather than just two as previously thought - a more complex ancestry for the archipelago nation of roughly 125 million.

Moroccan cave yields oldest clues about advent of human clothing

People may take the necessity and existence of clothing for granted, from shirts to pants to dresses, coats, skirts, socks, underwear, bow ties, top hats, togas, kilts and bikinis. But it all had to start somewhere. Scientists on Thursday said artifacts unearthed in a cave in Morocco dating back as far as 120,000 years ago indicate that humans were making specialized bone tools, skinning animals and then using tools to process these skins for fur and leather.