Neil deGrasse Tyson warned against giving the astronauts glass cutlery after their space trip, as they are quite used to zero gravity where objects float. The first instinct of an astronaut back home is to just drop the utilities. Tyson stated that plastic cups are best suited for rehabilitation back on Earth.

What exactly happens to the body in space and what are the risks? In space, astronauts are exposed to varied and increased levels of radiation that are different from those on Earth. Read on to know how it affects human body.

Doctors have raised concerns about the health of NASA astronaut Sunita 'Suni' Williams after photos show the 59-year-old looking noticeably thinner.