Deep space travel has a biology problem. Human bodies are built for a narrow band of temperatures, gravity and radiation, yet any realistic journey to Mars or beyond would subject astronauts to months ...

In Focus delivers deeper coverage of the political, cultural, and ideological issues shaping America. Published daily by ...

When scientists first sent microscopic worms into orbit in 2018, they hoped to answer a question that has shaped every discussion about long missions. What really happens to your body when gravity no ...

NASA has completed over 100 cold-flow tests of a full-scale nuclear rocket reactor prototype, demonstrating stable hydrogen ...