My aunt says if you tried to dig a hole to the other side of Earth, this is what would happen: First, you’d dig through loose ...

Tech billionaire and 3 others return to Earth after first private spacewalk.

They pulled off the first private spacewalk while orbiting nearly 460 miles (740 kilometers) above Earth, higher than the ...

The Polaris missions are helping fast-track Elon Musk's Mars city, from testing spacesuits and a spacewalk to planning ...

The Dragon capsule splashed down in the Gulf of Mexico near Florida's Dry Tortugas in the early hours of Sunday.

The Polaris Dawn crew is back on Earth after five days in orbit, following a mission featuring the world's first commercial ...

A new study links the largest mass extinction, which occurred 252 million years ago during the Permian-Triassic period, to ...

SpaceX's Polaris Dawn crew has returned to Earth after five days in orbit, following an historic mission featuring the ...

Coelacanths are deep-sea fish that live off the coasts of southern Africa and Indonesia and can reach up to two meters in ...

A billionaire spacewalker returned to Earth with his crew on Sunday, ending a five-day trip that lifted them higher than ...

Here's what happened when a fifth-grade teacher teamed with colleagues to create comprehensive climate lessons that could be ...