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 ...

A new study led by researchers at the University of Arizona suggests that for every recognized vertebrate species, there are, on average, two ...

Yes and no: It depends on how you classify animals. There are two main classification systems – the Linnaean system which groups organisms by characteristics and the phylogenetics system, which ...

Snakes and mice don't look alike. But much of what we know about skin coloration and patterning in vertebrates generally, including in snakes, is based on lab mice. However, there are limits to what ...

(Reuters) -Seventeen footprints preserved in a slab of sandstone discovered in southeastern Australia dating to about 355 million years ago are rewriting the history of the evolution of land ...

Fossilized skin impressions uncovered in central Germany are now regarded as the oldest known evidence of reptile skin. Dating backroughly 298 to 299 million years, the find preserves intricate scale ...

Researchers have uncovered 300-million-year-old reptile skin impressions in Germany, the oldest direct evidence of reptile ...