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75-million-year old eggshells suggest most dinosaurs were warm-blooded
An analysis of eggshells from three kinds of dinosaurs shows they were all warm-blooded, suggesting that dinosaurs鈥� ancestors were also warm-blooded
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An analysis of eggshells from three kinds of dinosaurs shows they were all warm-blooded, suggesting that dinosaurs鈥� ancestors were also warm-blooded
Birds' feathers are so complicated that it was a mystery how they evolved. The answer might be a rare combination of natural and sexual selection