Introduction

Many million years before human were born, amazing creatures lived in earth. They were reptiles like crocodiles and chameleons. Some of these reptiles flew in the air and some were living under-water, but one special group of these creatures ruled the land. That group lived in the land are commonly called as Dinosaurs and they lived in earth for 155 million years.  "Dinosaur" is a Greek word that means "Fierce Reptile". Some Dinos ,were fierce warriors that had sharp teeth and paw nails, but many of them were peaceful plant eaters. Biggest dinos were more than 60 meters long but small creatures were only the size of a chicken.