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...the Cenozoic era of 70 to 40 million years ago if not the latter part of the Mesozoic era, which was 135 to 70 million years ago. The Mesozoic era wa...
...ptiles, the theriomorpha and the dinosaurs, the bat-winged reptiles of the Mesozoic forests, the colossal grotesque first mam- mals, the giant sloths,...