Human spaceflight has entered a phase where one company effectively controls the only operational ride to orbit for professional crews and most private passengers. SpaceX has turned what was once a ...

As private companies race to build orbital habitats and government agencies sketch out Mars timelines, a fundamental biological question remains largely unanswered: can humans safely reproduce in ...

Researchers from University of California San Diego Sanford Stem Cell Institute have discovered that spaceflight accelerates the aging of human hematopoietic stem and progenitor cells (HSPCs), which ...

A view from the forearm of the Tiangong robotic arm, showing Zhang Lu at work during the first Shenzhou-21 EVA. Credit: CMSEO HELSINKI — China will begin its first one-year duration astronaut mission ...