Earth May Have Once Had a Shell Like an Egg

A new study suggests that the Earth’s outer layer was once one solid shell that later broke into what we know today as tectonic plates. Josh King has the story (@abridgetoland).


Save videos for later by signing up or logging in

With "My Queue" you can quickly save videos to watch later.

To add an item to your queue just click the sign next to the video.

Once you've added a video visit "My Queue" to start watching!