Figure 1: Morphological variation in the pre-cloacal vertebral column of limbed lizards and snakes. Figure 3: Correspondence between Hox expression domains and morphometric boundaries for four-region ...

Unlike nearly every mammal that has seven vertebrae in its neck no matter how long or short its neck, sloths stand out as oddballs with up to 10. Now it turns out sloths are part of the fold (sort of) ...

A group of ancient amphibians called temnospondyls evolved stiffer spinal columns to adapt to aquatic life, contrary to previous hypotheses, according to a new study. A group of ancient amphibians ...

From a Hercules beetle tough natural armor to a sea anemone’s soft fluid-filled body, nature boasts a variety of skeletons. A circa-1910 x-ray photograph of pot-bellied seahorses shows their ...