An ancient slab of Earth's crust buried deep beneath the Midwest is sucking huge swatches of present-day's North American crust down into the mantle, researchers say. The slab's pull has created giant ...

Growing up, most of us learned that Earth is home to seven continents. But it may be time to rewrite the geography textbooks, as a controversial study now claims there are actually only six continents ...

Disregard what you learned in geography class—Earth may not have seven continents after all. From the earliest of grades, schoolchildren around the world have memorized the same lineup: Africa, ...

This video presents a comprehensive timeline of North America’s prehistoric creatures, from early ocean dwellers to the ...

Something very strange appears to be happening deep, deep underneath the U.S. Midwest and the Ohio Valley. North America’s geological core has persisted for more than a billion years; it’s what ...

A deep heat mass beneath the Appalachians appears to have started near a rift between Greenland and North America. Its slow southward journey reveals that ancient tectonic events still influence the ...