Sharks have existed for approximately how long?

What unusual thing can the bull shark do?

What are baby sharks called?

What are shark skeletons made of?

After eating a seal or a sea lion, how long can a great white shark go without another big meal?

How many teeth can a shark have?

Most sharks are harmful to humans

Which organ helps sharks to float?

What does the hammerhead shark use its unusually shaped head for?

How many shark species are there?

The chance of being attacked by a shark is very high