Dinosaurs Did Not Evolve Quickly In Last 50 Million Years, New Dinosaur Super-tree Shows

It has long been debated whether dinosaurs were part of the 'Terrestrial Revolution' that occurred some 100 million years ago during the Cretaceous when birds, mammals, flowering plants, insects and reptiles all underwent a rapid expansion. During their last 50 million years of existence, dinosaurs were not expanding as actively as had been previously thought and that the apparent explosion of dinosaur diversity may be largely explained by sampling bias.

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