Things You Didn't Know: "Sharks"

1. The man who invented the shark cage did so after being mauled by a great white shark!

2. Lemon sharks can grow a new set of teeth in eight days.

3. Sharks grow rings on their vertebrae when they age just like tree rings on trees.

 4.Before they're even born, sand tiger sharks eat their twin brothers and sisters.

5. Sharks have been around for LONGER than dinosaurs - nearly 400 million years. Some prehistoric sharks were 80 feet long - almost as long as a BASKETBALL COURT.

Source: http://www.omg-facts.com/lists/299/13-Awesome-Facts-About-Sharks/