Dinosaurs didn't start out as towering behemoths - they evolved from small, agile reptiles the size of house cats.
Many dinosaurs, including the fearsome T-Rex, were actually covered in feathers, making them the evolutionary ancestors of today's birds.
Paleontologists can determine a dinosaur's diet and behavior just by carefully examining its fossilized bones and teeth.
The Nigersaurus had an incredible ability to rapidly replace its teeth, shedding and regrowing them as often as every 2 weeks.
Even in the modern era, paleontologists continue to uncover new and previously unknown species of dinosaurs from around the world.
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