Tyrannosaurus rex lived about 65 to 70 million
years ago during the beginning of the
Cretaceous period and end of the Mesozoic era.
Many roamed around present-day western North
America. They were carnivores - which means they
hunted their dinosaur prey - and were able to eat
many pounds a day. T. rex could grow to massive
sizes, and scientists often call them the
"kings" of all the dinosaurs.
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