For decades T. rex was thought to be descended from Allosaurus, a Jurassic carnosaur. Just about every book I read said that. T. rex inherited North America from its ancestor Allosaurus and continued the reign of terror.
Nowadays thanks to modern scientific techniques and new fossile finds we know that's not true. For one thing, T. rex's bones were found to be hollow, with the exception of the legs. Allosaurus' bones were solid throughout its body. For another, smaller members of the tyrannosaur family such as Daspletosaurus and Albertosaurus bear a striking resemblence to the raptors like Deinonychus.
Recently in Mongolia, the earliest ever known member of the tyrannosaur family was a found, a little guy that scientists named Dilong paradoxus, or Paradoxical Dragon Emperor. What made him so amazing was: he had FEATHERS!!! That's right folks, T. rex's great, great, great grandpa was a little feathered fellow (as I like to call those cute feathered dinosaurs they've been finding in Yixian, China recently). Having feathers means that Dragon Emperor was warmblooded and needed the feathers for insulation due to his small size. Dilong migrated west from China into Europe and North America, growing bigger as it went. It grew into Daspletosaurus, then Albertosaurus and finally T. rex.
For decades T. rex was thought to be descended from Allosaurus, a Jurassic carnosaur. Just about every book I read said that. T. rex inherited North America from its ancestor Allosaurus and continued the reign of terror.Nowadays thanks to modern scientific techniques and new fossile finds we know that's not true. For one thing, T. rex's bones were found to be hollow, with the exception of the legs. Allosaurus' bones were solid throughout its body. For another, smaller members of the tyrannosaur family such as Daspletosaurus and Albertosaurus bear a striking resemblence to the raptors like Deinonychus.Recently in Mongolia, the earliest ever known member of the tyrannosaur family was a found, a little guy that scientists named Dilong paradoxus, or Paradoxical Dragon Emperor. What made him so amazing was: he had FEATHERS!!! That's right folks, T. rex's great, great, great grandpa was a little feathered fellow (as I like to call those cute feathered dinosaurs they've been finding in Yixian, China recently). Having feathers means that Dragon Emperor was warmblooded and needed the feathers for insulation due to his small size. Dilong migrated west from China into Europe and North America, growing bigger as it went. It grew into Daspletosaurus, then Albertosaurus and finally T. rex.
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