New research found when the first warm-blooded creatures started roaming the earth

Morganucodon

New research showed warm-blooded mammals started roaming the earth around 233 million years ago, 19 million years later than previously believed. The Triassic period, which had the first mammals was also the beginning of the age of the dinosaurs. The evidence was found in the fossil’s inner ears.

 

Photo by: https://commons.wikimedia.org/wiki/File:Morganucodon.jpg

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