You may have heard a lot of online chatter about Earth's two moons recently, but that doesn't quite get the discovery right. Earth still only has one true natural satellite — our 2,159-mile-wide moon ...

Why is Earth not just water? Where does land come from, and why does it exist? Find out more about earth's origins with Hank ...

On Earth Day, the globe celebrates our planet by supporting all things Mother Nature. This year, Earth Day lands on Tuesday, April 22. The day has been celebrated for 55 years, and while not federally ...

Explore mind-bending revelations in "25 Astonishing Facts About The Earth That Will Confuse You." Unveil secrets from explosive lakes to the magnetic field flip, and discover the wonders shaping our ...

If someone tried to put a price tag on Earth, what would that number even be based on? Land, oceans, ecosystems, raw ...

Happy Earth Day! For the 55th year, the world is using the day to celebrate Mother Nature and the wonderful planet we live on. "Earth Day really is a symbol of the environmental movement," Sarah ...

When the first Earth Day was held on April 22, 1970, the founders — U.S. Senator Gaylord Nelson (D-WI) and activist Denis Hayes — said its purpose was to draw public attention to what was at the time ...

Researchers are learning details about asteroid impacts going back to the Earth's early history by using a new method for extracting precise information from tiny "spherules" embedded in layers of ...