These days, all fish have teeth. The shapes of their teeth vary according to diet, ranging from the little pegs of goldfish ...

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 ...

Biologists have considered nearly every major taxon of animals as the key starting point for the evolution of vertebrates. We survey these ideas, many of which are no longer tenable in the light of ...

An in-depth analysis reveals that for each identified vertebrate species, there may be two others, nearly identical in ...

Scientists have uncovered new clues about some of Earth’s earliest fish, shedding light on the ancient origins of vertebrates ...

A major fossil discovery in Canada sheds new light on the development of the earliest vertebrates, including the origin of jaws, the first time this feature has been seen so early in the fossil record ...

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

Vertebrates have extremely different brain sizes: even with the same body size, brain size can vary a hundredfold. As a rule, mammals and birds have the largest brains in relation to their body size, ...