Ancient Greek philosophers envisioned a fourth continent across the Atlantic, anticipating America centuries before Columbus.

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. An ancient slab of Earth's ...

In a remarkable geological finding, researchers at The University of Texas at Austin have discovered that the underside of the North American continent is slowly dripping away in blobs of rock. This ...

"A Prehistory of South America is an overview of the ancient and historic native cultures of the entire continent of South America based on the most recent archaeological investigations. For more than ...