According to the Dinosaurs Fatherhood like a walk in the park vintage shirt old traditional school classification, they didn’t. They were put into the Reptilia class. So you will have vertebrates and classes like Amphactus, Reptilia, Aves, Mammalia, and Pisces. And dinosaurs are the two commands of reptiles, Saurischian, and Ornithischians. Reptiles’ orders for life will be the Testimony to turtles, Squamata for lizards and snakes, and Crocodylia. But of course, as everyone knows, birds are a type of dinosaur. So if the dinosaur was a reptile, then the bird must also be a reptile. But we only say that Aves is a class of Vertebrata. So Aves is no longer a class. It has been downgraded. Imagine that for millions of years in the future almost all mammals will become extinct, except for bats. And then paleontologists dug up fossils of elephants and cows and tigers, which didn’t look like bats.
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These robots will be Dinosaurs Fatherhood like a walk in the park vintage shirt confused at first, but realize that these extinct mammals have shared the features with bats, and will soon conclude that bats are actually a type of mammal. And the robot public will find it hard to accept that, because looking at an elephant’s skeleton and looking at a living bat, they’re completely different. The Chiroptera class will have to be downgraded to Mammalia’s order, but there will still be difficult feelings about it. In any case, Dinosauria will earn a good grade. Dinosaurs are contained in the Reptilia class and Birds are contained in Saurischians, the lizard species which is ironically named hipster. The impact is good. A compsathathus like you mentioned was a Jurassic dinosaur and went extinct, due to competition or evolution into something else, at the time the asteroid hit.
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In addition, suppose that some small non-bird dinosaurs could survive and evolve into another, they would also have to Dinosaurs Fatherhood like a walk in the park vintage shirt compete with dinosaurs and small mammals that survived and could be excluded from very soon. If it was a non-bird dinosaur that still had the advantage to let them cling to them, they would have been able to compete with dinosaurs and mammals enough to hold a good position in the ecosystem.