Human space flight is usually clubbed with all other space activities and hence allotted to government space agencies, who tackle it with a rigid procedural approach. They usually possess large ...

Human spaceflight is built on a simple paradox: the farther people travel from Earth, the more fragile their bodies and missions become. NASA has distilled that reality into five core hazards that ...

"If reproduction is ever to occur beyond Earth, it must do so with a clear commitment to safety, transparency and ethical ...

Early prototypes of the SpaceX Starship super-capsule that Italy is chartering to speed its spaceflight and biotech experiments to Mars (Marie D. De Jesús/Houston Chronicle via Getty Images) With its ...

SpaceX currently operates the only crew-capable spacecraft capable of reaching the International Space Station. Boeing has a similar spacecraft, but NASA is afraid to put people on it. Russia's only ...

Scientists working with NASA have discovered evidence that human stem cells undergo accelerated aging when exposed to the rigors of spaceflight. The main culprits seem to be microgravity and cosmic ...

Since the dawn of human spaceflight, scientists have carefully studied the effects of space and microgravity on astronauts. After decades of observations and examinations, one truth is certain: space ...

Challenger exploded 73 seconds after liftoff while carrying seven people, including "Teacher in Space" participant Christa McAuliffe. Nobody survived the launch on Jan. 28, 1986 from NASA's Kennedy ...

ESA astronaut Alexander Gerst takes a selfie during an EVA outside the International Space Station in 2014. New research shows that when astronauts spend extended periods of time in space, their ...