Science
Harvard study challenges lateral-to-sagittal shift in mammal spine evolution – EurekAlert
The study challenges the lateral-to-sagittal hypothesis by looking at the vertebrae of modern reptiles, mammals, and the extinct nonmammalian synapsids to determine…
IMAGE: Photograph of a skeleton of the early non-mammalian synapsid (ancient mammal relative) Edaphosaurus on display at the Field Museum of Natural History.
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Credit: Ken Angielczyk
When it comes to the evolution of the mammal spine — think of animals whose backbone allows them to gallop, hop, swim, run, or walk upright — a key part of the tale is quite simple.
Because nonmammalian synapsids, the extinct forerunners to mammals, had similar traits to living reptiles (like having their…
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