From mice to giraffes, mammals are remarkable in that all but a handful of their 5000 species have exactly seven vertebrae in the neck. Among the few that deviate from this number are three-toed ...
A three-quarter view of a micro-CT scanned vertebral column segment and a single micro-CT scanned vertebra of a common thresher shark. In the thresher column, the frontmost vertebra is a transverse ...
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