Birds are living dinosaurs. - Scientist used to think that dinosaurs had no living relative. Now scientists think that over millions of years, small dinosaurs became birds., Most dinosaurs were warm-blooded. - Scientists used to think that dinosaurs were cold blooded, like snakes. Then they discovered that dinosaur bones were like the bones of other warm blooded animals., Many dinosaurs had feathers. - Scientists used to think that all dinosaurs had scaly skin, like lizards. Now scientists have found fossils of dinosaurs which had feathers., Some dinosaurs climbed trees. - Scientists used to think that dinosaurs couldn't climb trees. Then scientists in China discovered small dinosaurs which used their claws to climb trees., Some dinosaurs had poisonous bites. - Scientists used to think that there were no poisonous dinosaurs. Recently scientists discovered a dinosaur with teeth like a poisonous snake.,

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