After nine months in space, NASA astronauts Butch Wilmore and Suni Williams are returning to Earth aboard a SpaceX capsule, set to splash down off Florida.
Originally planned as an eight-day mission, their stay on the ISS was extended due to spacecraft issues.
Dr Meganne Christian, the UK's ESA Reserve Astronaut, said re-adapting to gravity and social interaction will be challenging after months in microgravity.
Report by Covellm.
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