There are millions of different types of living things on Earth. In order to keep track of them all, scientists put living things into groups based on characteristics that they have that are the same.

Add Yahoo as a preferred source to see more of our stories on Google. After an ancient extinction killed about 85% of marine species, survivors in isolated refuges helped jawed vertebrates diversify ...

There may be twice as many vertebrates on the planet as previous estimates claimed, according to a new study published in the journal Proceedings of the Royal Society B: Biological Sciences. That's ...

Dedication to William Buckland / Christopher J. Duffin -- Introduction. Vertebrate coprolite studies : status and prospectus / Adrian P. Hunt ... [et al.] -- History of study. The earliest published ...