Illustrations of facial development in mammals (right) and evolutionarily older species (non-mammalian tetrapods). (IMAGE)
Caption
Experts at the University of Tokyo used cellular studies and reexaminations of fossilized skulls to develop a new, improved understanding of how mammals developed separate noses and upper jaws. This reorganization of the premaxilla and septomaxilla bones likely allowed mammals to form flexible noses that can “sniff.”
Credit
Image by Hiroki Higashiyama, CC BY-SA 4.0
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CC BY-SA