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The Triceratops went extinct about 66 million years ago during the Cretaceous–Paleogene extinction event.
Scientists think a giant asteroid hit Earth near the Yucatan Peninsula in Mexico. The crash threw lots of dust into the sky and blocked sunlight. Because of this: (1) Plants couldn’t grow. (2) Plant-eating dinosaurs like Triceratops had no food. (3) Many animals eventually died out. So, when the plants disappeared, Triceratops couldn’t survive. |
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The Tyrannosaurus rex (T. rex) went extinct at the same time as Triceratops, about 66 million years ago during the Cretaceous–Paleogene extinction event. A huge asteroid hit Earth near the Yucatan Peninsula in Mexico. Dust blocked the sunlight, so plants died. Because of this: (1) Plant-eating dinosaurs lost their food (2) Meat-eating dinosaurs like T. rex lost their prey With little food left,T. rex could not survive and it eventually went extinct. |
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The Brontosaurus actually went extinct much earlier than dinosaurs like Tyrannosaurus rex and Triceratops. It lived about 150 million years ago during the Late Jurassic period. Scientists are not exactly sure why Brontosaurus disappeared. Possible reasons include: (1) Climate changes. (2) Changes in plants they ate. (3) Competition with other dinosaurs So, Brontosaurus was already gone long before the asteroid impact that caused the Cretaceous–Paleogene extinction event 66 million years ago. |