An in-depth analysis reveals that for each identified vertebrate species, there may be two others, nearly identical in appearance but genetically distinct. Scientists have long classified ...

According to the data considered by its authors—a team from the University of Sussex (UK) and Lund University ...

The researchers from the HiLIFE Institute of Biotechnology, University of Helsinki compared two central bearded dragon lizards (Pogona vitticeps): a normal one and a mutant with no body scales. They ...

Scientists may have been dramatically undercounting the number of vertebrate species on Earth. A large analysis of more than 300 studies suggests that for every recognized species of fish, bird, ...

Hutton, Nicholas, III. 1976. "Origin and Radiation of the Classes of Poikilothermous Vertebrates." In Evolution of brain and behavior in vertebrates. Masterton, R ...

Learn how increased protein diversity in signaling genes may have helped drive the shift from invertebrates to vertebrates, reshaping how animals with a spine evolved. From frogs and fish to birds and ...

A tiny fossil fish, roughly 3 centimeters long and approximately 436 million years old, has been identified as the oldest ...