Butch Wilmore and Suni Williams left the International Space Station after nine months in space, checking out with two other ...

While those characters may have discovered a beautiful and mysterious world deep down, a new study published in Nature Communications suggests that the Earth’s true core is probably just a 400 ...

Brr! But in sunlight near Earth, temperatures can swing to a boiling 250 degrees Fahrenheit. That's why astronauts wear reflective white spacesuits. Unimpeded, light can move at 299,792,458 meters ...