(BBC) – Astronauts Suni Williams and Butch Wilmore are back on Earth after their eight-day mission aboard the International Space Station (ISS) unexpectedly became a nine-month enforced stay. Now, their recovery begins.

“Space is by far the most extreme environment that humans have ever encountered and we’ve just not evolved to handle the extreme conditions,” Prof Damian Bailey, who studies human physiology, at the University of South Wales, says. (Read More)