The Hubble Space Telescope captured an image of NGC 4694, a galaxy that possesses unusual properties that complicate its ...

Miles of air cover Earth. The boundary between Earth's atmosphere and outer space, the Kármán line, is about 62 miles (100 kilometers) above the planet's surface. However, about 99.9% of the mass of ...

On Earth, the magnetic field of our planet points a compass north, but in space, things are a bit more complicated.

Octopus filmed firing stones from her siphon from inside a clam shell like a sniper in never-before-seen behavior captured ...

Neanderthals tended to bury their dead in caves, while early modern humans buried their dead in the fetal position, new ...

How many of the 160 named volcanoes in the U.S. and territories do you know? If you live in Alaska you have a big advantage.

For the first time ever, marine biologists have measured how much energy octopuses really need to change color — and it's a ...