cambrian explosion

The Cambrian Explosion: A gateway into our past

About 545 million years ago, the world was much different than it was today. Covered almost completely by ocean, the only life was in the sea. Suddenly, there was an explosion of creatures that would be deemed weird by today’s standards. They were swimming around in great numbers in a period known as the Cambrian. With these creatures however, comes a problem. Where did they all come from?