Throughout Earth's history, there have been stories of vast, unexplored lands that vanished into the abyss of time. These "lost continents" have captivated explorers, historians, and geologists for ...

From golden plains to stunning caves and cliffs, the central portion of the United States offers landmarks and natural landscapes that deserve to be on anyone's summer travel list. This is part of a ...

Humans first arrived in South America through a series of extraordinary migrations – and genetic studies now reveal more ...

About 340 million years ago, the Appalachian Mountains were as tall as the Himalayas and spanned across what is today three continents.