The First Sea Monster

You Are Diving Into the Ordovician Ocean | 450 Million Years Ago

Where Ohio’s Ancient Bones Were Left by the Sea

5 Mass Extinctions that changed everything

A squid-like fossil was hiding in the same rock layer as crystal-filled shells

Why the Most Successful Creature in Earth’s History Went Extinct

Prehistoric Edition | Transformation

When Life on Earth Came Within Moments of Ending

The Age of Marine Kingdoms | Ordovician Oceans Come Alive #Ep43

Liverworts: The Tiny Plants That Changed Earth Forever

The First Mass Extinction | When 85% of Life Vanished #Ep47

Nature Bites | The End of the World: The Ordovician Extinction

Why did the Ordovician oceans flourish — then collapse?

Amazing Trilobite Fossil Discovery in Morocco | Multiple Ordovician Trilobites Found!

How Sharks Survived 5 Mass Extinctions

The moment life transformed Earth's oceans. #ancientearth