This is known as the biological species concept. This species definition divides up animals, plants and other forms of life into groups based on their reproduction. For example, deer species such as ...

A critically endangered new species of killifish sampled from an ancient forest in Kenya in 2017 and 2018 has been described ...

To what extent do phenotypic and species diversity arise via the same processes, as proposed by Darwin? Recent years have seen renewed efforts to address these questions. For example, populations ...

Keystone species play the same role in many ecological ... Intensive browsing of aspen (Populus tremuloides) stands, for example, led to a rapid decline in the number of seedlings and root sprouts ...

A well-studied example of a ring species is the salamander Ensatina escholtzii of the Pacific Coast region of the United States. In Southern California, naturalists have found what look like two ...

A species is a group of organisms that interbreed to produce fertile offspring. Selective breeding is when organisms are deliberately bred so their offspring have the desirable characteristics.

A species is a group of organisms that interbreed to produce fertile offspring. Selective breeding is when organisms are deliberately bred so their offspring have the desirable characteristics.

Larger species face higher cancer risks but those that reached that size rapidly evolved mitigating mechanisms.

Paleo-inspired robots reveal how extinct species moved, testing biomechanics to uncover the forces that shaped evolution.

Other species are among the living dead because of their interrelationships -- for example, the loss of a pollinator can doom the plant it pollinates, and a prey species can take its predator with ...

Conservationists say delisting would harm wolf populations already threatened by climate change, loss of habitat and weak ...