Learn about the new hydrothermal feature that appeared last winter in Yellowstone National Park, possibly on Christmas Day.

Sotheby’s in New York will be auctioning the largest martian meteorite ever found on Earth on Wednesday as part of a natural ...

Alone among known planets, Earth has vast oceans on its surface and its landmasses are marked with lakes and extensive river drainage systems. Water is the biosphere's lifeblood, and without it, Earth ...

The newfound exoplanet, called Kepler-139f, is a gigantic world roughly twice the mass of Neptune and 35 times the mass of ...

Learn more about BLOBS, mantel plumes 1,500 miles into Earth's mantel that contribute to massive volcanic eruptions on the surface.