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How did mammals grow so large after dinosaurs died off?

How did mammals grow so large after dinosaurs died off? According to a new study, the answer all boils down to ecology. The herbivores grew large first, perhaps because they had an advantage in eating the vegetation left flourishing after the plant-eating dinosaurs were gone. Just like with today's lions

Dinosaurs may have been bigger than we thought

New research has shown that some dinosaurs may have been up to 10% taller than originally thought. There's no shortage of fossilized bones. But there are enough missing pieces -- the cartilage and joints that connected all of those bones, for example -- to leave scientists sort of guessing at

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