Some species officially bid us farewell this year. They may have long been gone, but following more recent assessments, ...

In Bolivia’s disappearing Amazonian frontier, a small but significant rediscovery has stunned conservation biologists. A rare fish species long presumed extinct, Moema claudiae, has been found alive ...

Just because a species is presumed extinct doesn’t mean it’s gone forever. Here are four glowing examples of this unique, and felicitous, phenomenon. Not all species that have been classified as ...