Specialists from the state’s Department of Fish, Wildlife and Parks are working to determine what creature a rancher shot and killed.

A study finds two species of guenon monkeys in Tanzania have been mating and producing fertile offspring for generations.

DNA from the 40,000-year-old bones of a modern human found in Europe contains Neanderthal genes.

Rising temperatures allow one mountain ant to climb higher, displacing a related species and possibly upsetting plant ecology.

Unwilling to accept the finality of terminal differentiation, Helen Blau has honed techniques that showcase the flexibility of cells to adopt different identities.