Decades of previous research has linked the lack of genetic diversity and related limitation on adaptation in endangered ...

The largest-ever study of over 2.6 million zoo birth records reveals skewed sex ratios in endangered species, from lemurs to ...

Extinction is an overwhelming concept, difficult to grasp in its enormity and finality. Thousands of species are barreling ...

Cells of Sumatran tigers, like the one pictured here, are part of the Frozen Zoo, a collection of more than 10,000 cells from endangered animals. (Mark Kolbe/Getty Images) ...

These endangered animals in the U.S. are almost extinct. From the Hawaiian monk seal to the Florida panther, find out what threats these animals face.

The southernmost herd of endangered woodland caribou in Manitoba might not be able to recover from wildfire-caused habitat and population losses, experts say. Fire burn patterns and maps suggest a ...