Starting small and simple was key to success for evolution of mammals, reveals new study CommsBio
and lower jaw of animals with a backbone are composed of numerous bones. This was also the case in the earliest ancestors of modern mammals over 300 million years ago.around 150 to 100 million years ago.and stress analyses to investigate the purpose of this skull simplification.
Digital skull model of the small-sized Jurassic mammal ancestor Hadrocodium wui. Credit: Dr Stephan Lautenschlager, University of Birmingham
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