Change in astronaut's gut bacteria attributed to spaceflight

Northwestern University researchers studying the gut bacteria of Scott and Mark Kelly, NASA astronauts and identical twin brothers, as part of a unique human study have found that changes to certain gut "bugs" occur in space.

Sore—but no taller—astronaut Scott Kelly adjusts to Earth

US astronaut Scott Kelly said Friday he is battling fatigue and super-sensitive skin, but is back to his normal height after a year spent testing the effects of long-term spaceflight ahead of a future mission to Mars.

The "omics" of space travel

The human body is incredibly complex. Every part of us—from our bones to our blood cells—is subject to a host of chemical reactions and molecular interactions that, without our conscious effort, keep us alive.

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