The saola, or "Asian unicorn," wasn't discovered until 1992.
Native to a mountainous region of Vietnam and Laos, "saola" means "spindle horns" in Vietnamese.
Like antelope and bison, the saola belongs to the ruminant artiodactyl family Bovidae. According to the World Wildlife Fund, this enigmatic creature is super rare — scientists have only documented wild saola on four occasions.