Millions of years ago, before there were people, giant reptiles lived on earth.
Some reptiles could fly.
Some reptiles lived in water.
Some lived on land and were called dinosaurs.
Say pah-ruh-saw-roll-oh-fuss
P is for parasaurolophus.
It had a big crest like a hook on its head.
Its mouth was like a duck's bill.
It walked on four legs and two legs.
It ate plants.
Say pack-ee-sef-uh-low-saw-russ
P is for pachycephalosaurus.
It had a very thick skull.
There were bumps on its skull and nose.
It had a stiff tail.
It ate plants.
This is the skeleton of a pachycephalosaurus.