Deep-sea fish adapt to some of the most extreme conditions on Earth. New research analyzing their evolution finds the same ...

Same-sex sexual behavior has been documented in over 1,500 animal species. It occurs across virtually all major groups — from insects and worms to reptiles, birds, and mammals. While it’s not the norm ...

The researchers added the “curious” to the butterfly’s common name because of its uniquely “small population size and high ...

By the time de Queiroz had examined the specimen from snout to tail, there was little doubt: Charles Wright’s lizard and the widely doubted Anolis incredulus were one and the same species.

That cell’s nucleus—which contains the individual’s entire genetic code—is then extracted and inserted into a donor ovum from the same species whose own nucleus has been removed.

Eventually, he tracked down six of these snakes. At first, Kraus thought these black snakes were the same species as a nearby island, but the closer he looked, the more unique features he noticed.

The species of canine -- about the same size as a modern gray wolf -- was native to the Americas but went extinct about 10,000 years ago. Colossal Laboratories & Biosciences, the company behind ...

The first method would involve using gene-editing tools such as CRISPR, to make changes that would likely exist in birds of the same species. The problem is that such an approach has not been done ...