![]() Steve: Well, did you know that the T-Rex is more closely related to a sparrow than it is to the triceratops? The other thing that is pretty cool is that the T-Rex lived 66 million years ago whilst the stegosaurus lived 150 million years ago. NGK: Do you have any favourite dinosaur facts? However, back then, there were big volcanic eruptions and temperature changes happening all the time which may also have contributed to their extinction. That certainly had something to do with the dinosaurs being wiped out. We think it was 6 miles wide and hit Mexico. We do know for a fact that 66 million years ago a big asteroid or comet did hit the planet. Steve: That”s the big question! It”s a question that people have been debating since the first dinosaurs were found. ![]() NGK: Wow! Do you know the reason why dinosaurs became extinct? We’ve heard different theories. In order for those to be preserved you need a perfect setting – they need to be buried very quickly so that they don”t decompose. It’s very rare to get preserved muscles, skin, organs or feathers because those soft parts decay very quickly after an organism dies. Normally we only get fossils of bones and shells – things that are very hard. Steve: You find the feathers themselves! It”s incredible if you think about it because feathers are not easy to preserve. NGK: How can you tell that dinosaurs had feathers? If you watch Walking With Dinosaurs: The 3D Movie you”ll notice that some dinosaurs have feathers – and that”s a pretty new way of looking at dinosaurs! Feathers are the primary evidence that birds evolved from dinosaurs – we now have tens of thousands of fossils of real dinosaurs covered in feathers. Steve Brusatte: I think the most important dinosaurs that were found over the past two decades are all of the feathered dinosaurs from China. What do you think are the most important dinosaur discoveries of the century? ![]() National Geographic Kids: Hi Steve! Thanks for answering our questions. ![]() Steve worked with the team on the mega movie Walking With Dinosaurs: The 3D Movie. Here at National Geographic Kids, we love learning about dinosaurs! To find out all about our planet’s prehistoric beasts, we caught up with dino-expert and palaeontologist Steve Brusatte. ![]()
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