Science News Roundup: Dinosaurs displayed a fast growth rate from the very beginning

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Dinosaurs displayed a fast growth rate from the very beginning

One of the traits that helped make the dinosaurs such an evolutionary success story - thriving for 165 million years - was their fast growth rate, from massive meat-eaters like Tyrannosaurus to immense plant-eaters like Argentinosaurus. But when did this characteristic first appear? A new study indicates it was present in the earliest dinosaurs, as revealed by microscopic features in bone fossils from Argentina that showed that they exhibited growth rates on par with those of today's mammals and birds.