10 Facts About Sharks You Did Not Know

10 facts about sharks you didnt know

1# The first sharks lived more than 400 million years ago—200 million years before the first dinosaurs. They have changed very little over the eons. 2# In its lifetime, a shark can have up to 30,000 teeth . They are continuously being replaced and shifted within the mouth. 3# Sharks are hypersensitive to pressure changes in the water. […]