Will they ever be extinct ?
Sharks were here 400 million years ago. Thats 200 million years before there
were dinosaurs. Scientists can tell how
old the shark fossils are by the age
of the rocks where they were found. Shark skeletons are hard to find because
the skeleton is made out of cartilage, and cartilage is to soft to be formed as
a fossil. Sharks have changed very little sense the time of the dinosaur. That
is because the first sharks were good at casthcing food and didn't need to
Now sharks have an enemy that they never had before. The enemy is man.
Sometimes sharks get cought in nets and
get thrown back, or their fins are cut off and saved and the rest is thrown
away. Many sharks are killed out of fear even if they are
safe. Once lions and tigers were hunted for these reasons. Like lions
and tigers sharks play an important roll in nature.
Scientists are trying to learn more
about sharks so that we can conserve them.