Old skull bone rediscovered in mammals

Although clearly discernible in the embryo, shortly afterwards it fuses with other bones beyond recognition. Consequently, researchers have often missed it. Now, however, paleontologists have rediscovered it: the “os interparietale”, a skull bone also referred to as the interparietal. Using imaging methods, they were able to detect its presence in all mammals – including humans, which is new as it was previously believed to have been lost in the course of evolution.

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