From the 20-foot-long jawbones of the filter-feeding blue whale to the short, but bone-crushing, jaws of the hyena and the delicate chin bones of a human, the pair of lower jawbones characteristic of ...

A Erin Flynn, conservation education curator at Henry Vilas Zoo in Madison, Wis.: Mammals such as giraffes, bears, humans and many more are vertebrate animals, meaning they have spines. They’re also ...

Over the past 530 million years, the vertebrate lineage branched out from a primitive jawless fish wriggling through Cambrian seas to encompass all the diverse forms of fish, birds, reptiles, ...

Earth’s vertebrate diversity may be far richer than anyone realized. A sweeping analysis of more than 300 studies suggests that for every known fish, bird, reptile, amphibian, or mammal species, there ...

Vertebrates are animals that have a spine (backbone) inside their body. Other organisms, like spiders and snails, that don’t have a backbone are called invertebrates. Fran: Here at the farm there are ...