New research tracking astronauts across six-month stays on the International Space Station suggests intensive exercise can ...

Long before modern plans for human exploration of Mars, American rocket engineers developed detailed proposals for sending astronauts to the Red Planet using technology available during the Apollo era ...

Examine the monumental challenges of sending humans to Mars, from a journey lasting nearly a thousand days to the extreme distances, communication delays, and life support demands. Understand the ...

A rocket’s cluster of engines firing in flight produces a bright-purple exhaust plume and thick golden smoke against a sunset sky over the ocean. Humans can leave Earth on rockets powered by chemical ...