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Since life first arose on Earth, nearly all dinosaurs, mammals, insects, and birds that have ever existed have gone extinct. In this voicy, full-color illustrated encyclopedia, hear from the animals themselves what happened to them! If your species happens to be alive right now, you should feel very lucky.You probably know about the downfall of the dinosaurs and how the dodo bird met its doom. But you might not have heard about the other weird and wonderful creatures throughout the eons that just didn't make it.But that doesn't mean all these stories are sad; extinction is just a part of the long, long history of life on Earth. And some of the ways these species died out are actually pretty silly . . .In this fully illustrated encyclopedia, you'll hear from the creatures who have faced extinction throughout the years - and learn what survival of the fittest means for those on evolution's bad side.