Long before the Sahara became the world’s largest desert, it was filled with rivers, lakes, and human settlements spread across a massive green landscape, and new research now suggests that beneath ...

Laser technology has revealed a hidden world of sophisticated urban centers and extensive networks within the Amazon ...

Earth's earliest continents may have set the chemical stage for life by regulating boron levels in ancient oceans, a new study in Terra Nova suggests.

Explore the history of the Aztecs, their incredible achievements in art, architecture, and warfare, as well as the factors ...