A new study has provided compelling new evidence that a huge "megaflood" refilled the Mediterranean Sea around 5 million ...

Things in the Arctic have never been hotter. In the past year, Russian nuclear submarines have practiced firing cruise ...

The deepest regions of Earth's oceans, known as the abyssal and hadal zones, lie at least as far under the water's surface as ...

One of the most active volcanoes in the world sits just a few hundred miles off the U.S. West Coast, and some scientists believe it’s only a matter of time before it erupts again – maybe even before ...