Astronauts are among the fittest and healthiest people in the world. They’re rigorously trained, vetted, and quarantined before they’re allowed up in space—and yet, despite all those precautions, they ...

Astronauts aboard the International Space Station are plagued by persistent rashes, unusual allergies and a variety of infections, including fungi, cold sores and shingles. Researchers now think they ...

The conflict between the brain's expectation of Earth's gravity and the reality of no gravity causes space motion sickness.

NASA-funded researcher Dorit Donoviel is leading efforts to design autonomous healthcare systems for astronauts on deep space missions.