Scientists discovered a new mammal. Hear its haunting bark.

On our wildly diverse planet, scientists are still finding new species. Even mammals. While on an expedition in Nigeria in 2009, researchers noticed a curious bark-like call in the night. It turns out the source was a creature new to science, a species of tree hyrax — small, herbivorous mammals — called Dendrohyrax interfluvialis.   It's not easy to confirm a new species, especially when it comes to an elusive, nocturnal, forest-dwelling animal in a remote region. The scientists announced a description of the novel species on Monday. (In the video, the "shriek" sound of another hyrax species is played first, which contrasts with the "bark" of the newly described species, played second.) Read more...More about Biodiversity, Science, and Animals