National Geographic announced Tuesday that it is officially recognizing the body of water surrounding the Antarctic as the Earth's fifth ocean: the Southern Ocean. The change marks the first time in ...

We show you how the world map and countries looked back then. Many millions of years ago, the world looked very different.

Have you ever tried smashing a ball into a flat rectangle? When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Walk into any school classroom and you ...