A Mars-size object called Theia smashed into Earth, and the debris coalesced into the moon. Now scientists believe they may have identified pieces of Theia at the bottom of Earth’s mantle. A new study ...

"You see quite a rapid acceleration." Scientists sound alarm after discovering how growing phenomenon could impact certain ...

Snowfall remains below average across much of the U.S., signaling a disturbing weather pattern. Areas that typically see snow ...