The saola, a forest-dwelling bovine, is also known as the Asian unicorn, and it is just as elusive as its mythical counterpart. Saolas are incredibly rare and are even considered to be the rarest large mammal in the world. They live only in a very small region on the mountainous border between Vietnam and Laos, and they evaded scientists for decades before the discovery of saola remains in 1992 alerted the scientific community of an as-yet-unknown species.

Saola