INFO:

A doctor has raised concerns about the health of one of NASA's stranded astronauts after a recent photo showed her looking 'gaunt.' Dr Vinay Gupta added that she doesn't 'think you can look at that photo and say she has sort of healthy body weight.' The body burns more calories in space as it adjusts to the changes in gravity and tries to maintain its temperature in cold conditions. They also exercise about 2.5 hours a day to prevent muscle and bone loss - which could all be evidence for Williams' possible weight loss.