Before modern wildlife, Earth was home to some truly massive prehistoric creatures that many people have never even heard of!

The untamed wilderness of prehistoric North America was a realm where terrifying prehistoric creatures reigned supreme ... enough to wander too close to the water. With a bite force rivaling ...

The animals constantly grew new shell material ... which scientists believe helped provide buoyancy and move ammonites through the water. It’s unclear whether ammonites were very efficient ...

CELINA - Though dinosaurs are the most notable of the prehistoric animals, smaller mammals and fish walked and swam in Ohio, ...