A recent study has uncovered the secret to the success of one of the most prosperous animal lineages — modern mammals. The key, according to the study, was to start out small and simple. According to the study, the ancestors of modern mammals, over 300 million years ago, had a skull and lower jaw
. Credit: Dr. Stephan Lautenschlager, University of Birmingham
However, during evolution, the number of skull bones was successively reduced in early mammals around 150 to 100 million years ago., an international team of paleontologists show how they used computer simulations and stress analyses to investigate the purpose of this skull simplification. commented: “Reducing the number of bones led to a redistribution of stresses in the skull of early mammals. Stress was redirected from the part of the skull housing the brain to the margins of the skull during feeding, which may have allowed for an increase in brain size.
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