Based on this finding, the researchers conclude that we are actually the same species as these ancient hominids, albeit an abnormally intelligent, weird-looking population of people within this ...

The questions "What are species?" and "How do we identify species?" are difficult to answer, and have led to debate and disagreement among biologists. See how consensus on answers to these ...

A keystone in an arch's crown secures the other stones in place. Keystone species play the same role in many ecological communities by maintaining the structure and integrity of the community.

Some variation is the result of differences in the surroundings, or what an individual does. This is called environmental variation. Humans, dogs and goldfish are examples of species. Different ...

Deterioration of ecosystems due to the vulnerable status of multiple species has posed a huge challenge for environmentalists. Scientists have come up with a way to combat this problem by ...

Variation is the differences between individuals of the same species, caused by genetic and environmental factors. Surveys into variation give data that are continuous, which means to come in a ...

From Pekingese to St. Bernard and greyhound, dogs come in such startling variety it's easy to forget they belong to the same species. The profusion of breeds today -- at least 150 -- reflects ...