In an ever growing number of cases, animals housed in zoos or special breeding facilities are among the last remaining members of their species. In some instances, they are the only members.

Either because their offspring, which is called a hybrid ... and so on as we circle -- or ring -- around the North pole. The last species in the ring is the lesser black-backed gull of ...

Discovered in Australia, the fossils represent a new species that lived during the Miocene epoch and highlight how iron-rich ...

They live in tubes and project their delicate heads out to breathe ... There are around 20 species of Vestimentifera known worldwide, and this will likely be one of the last species ever to be named ...