By Will Dunham WASHINGTON, March 30 (Reuters) - As humankind moves toward the goal of establishing a long-term presence on ...

Getting to Mars is difficult. Conceiving a child there could be even tougher than expected. A recent study led by researchers from University of Adelaide has demonstrated that simulated microgravity ...

Sperm may lose their ability to navigate in microgravity, raising new questions about whether human reproduction is possible ...