Mars is a cold, dry, desert-like planet. But billions of years ago, scientific evidence suggests that it had a thick ...

As NASA prepared astronauts for its second mission into space, National Geographic had exclusive behind-the-scenes access for ...

In a striking new view from space, the European Space Agency's Solar Orbiter has given scientists their first close-up ...

In space, every action becomes more complicated—and CPR is no exception. With no gravity to keep you grounded, astronauts have to completely rethink how to deliver chest compressions. In this video, ...