dinosaur facts

                            last week I made facts about dinosaurs
Dinosaur facts
Did you know that dinosaur DNA is trap in mosquitos.

Did you also know that dinosaurs roamed the earth for about 165 million years, they died out because of an astoriod that hit earth around 65 million years ago.  The astoriod caused such a big cloud that the sun could not reach the earth and almost everything died from starvation and the cold.
 Some of the animals to survive were birds, crocodiles, sharks, Lizards, frogs and salamander.
why they died. The Cretaceous . extinction event, or the K-T event, is the name given to the die-off of the dinosaurs and other species that took place some 65.5 million years ago. For many years, paleontologists believed this event was caused by climate and geological changes that interrupted the dinosaurs' food supply. How long did ]it take for the dinosaurs to die after the asteroid?
When a 10-kilometer-wide asteroid hit the Gulf of Mexico 66 million years ago, it drove over 75% of Earth's species to extinction, including the dinosaurs. But within just a few years, life returned to the submerged impact crater, according to a new analysis of sediments in the crater. dinosaur names, tyrannosaurus, Spinosaurus, velociraptor, triceratops, oviRaptor, dilophosaurus, troodon, diplodocus, apatosarus, brachiosaurus, mosasaurus, allosaurus.  Dinosaurs show some of the most extreme variations in size of any land animal group, ranging from the tiny hummingbirds, which can weigh as little as three grams, to the extinct titanosaurs, which could weigh as much as 90 tonnes (89 long tons; 99 short tons).
How much does at rex skull weigh?
A recent analysis of Sue, published in 2011 in the journal PLOS ONE, shows T. rex weighed as much as 9 tons (about 8,160 kilograms). T. rex had strong thighs and a powerful tail, which counterbalanced its large head (Sue's skull is 5 feet, or 1.5 m, long) and allowed it to move quickly.