Whatcheeria, a six-foot-long salamander-like creature that lived 340 million years in the past, was the T. rex of its time: the largest, baddest predator in its habitat. A brand new examine reveals how they grew to their ‘big’ measurement: as a substitute of rising sluggish and regular all through their lives like many fashionable reptiles and amphibians, they did most of their rising after they had been younger.
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