Some dinosaurs could see in the dark! The Velociraptors were hunters that were about the size of a big turkey.
A T-Rex was about 13 feet tall (taller than your parents!), weighed about 9 tons (almost as much a school bus), and could run almost as fast as a deer! T-Rex was one of the best hunters of all time… all the other dinosaurs ran when they saw him coming. You’ve heard of the T-Rex, right? Some people call him the King of The Dinosaurs. Have you ever heard a sonic boom? Sometimes planes make them when they fly over your head really, really fast. The Apatosaurus was a type of dinosaur that grew over 75 feet long, weighed about 22 tons, was 15 feet high, and could actually make a sonic boom with his tail. That was a long time ago!Īs time went on, dinosaurs evolved to be pretty amazing! And the very first person to find a dinosaur fossil was Reverend Robert Plot, in England. So they might change what a dinosaur is called or whether it’s part of another group.īy the way, did you know that scientists who study fossils like dinosaurs are called Paleontologists? Some of the most famous paleontologists were Jack Horner, Mary Anning, and Edwin H. Scientists discover new types of dinosaurs all the time, and sometimes they go back and figure out something new about dinosaurs they already found. Inside those two groups, over 800 types of dinosaurs evolved… that we know about so far. The other types were the Ornithischians, which were the dinosaurs that ate plants, like the Stegosaurus. The dinosaurs evolved into two different basic types: the Saurischians, like the Dilophosaurus. Do you know about the theory of evolution? It means that animals, like dinosaurs, will keep changing and turning into new types of dinosaurs as time goes by. The Herrerasaurus was a hunter… so watch out if you ever see one!Īs time went on, more and more Dinosaurs were born. He could grow to be about 20 feet long and weighed over 700 pounds. It was really fast and would hunt other animals and eat plants. The Erorapter was about 3 feet tall and weighed around 20 pounds. Some of the earliest ones we know about were called Herrerasaurus and Eoraptor. You probably think of dinosaurs as giants, but the first dinos were pretty small. Days were shorter too because the Earth actually spun around the Sun a little bit faster. When dinos were first born, Earth was hot and dry… even in places like Antarctica that are now covered in snow. So if a Dinosaur wanted to, he could walk from where you live now all the way to Australia… if he had a lot of energy! All of the different places on Earth were part of one big land. Do you know about the continents? When dinos were around, there was only 1 continent.
When dinosaurs were born, the Earth was a very different place. That’s how long ago the very first dinosaur was alive. How old are you? Think of that number, and take it and stretch it out all the way to the Moon… about a thousand times. Did you know that the first dinosaur was born about 230 million years ago? That was a long, long time ago.
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