You just can't get any cooler than giant hornets that can kill yaks.
The giant Asian hornet (Vespa mandarinia) has earned the nickname "yak killer" from local villagers. At nearly 2 inches long, they're the world's largest hornets. Victims describe their quarter-inch-long stingers as feeling like a hot nail. The stinger delivers a lethal venom that dissolves human tissue, and, as the name implies, can kill a yak.
This hornet was just one of several new and/or endangered species reported on by scientists from Conservation International and Disney's Animal Kingdom (yes, Disney). The joint team spent two months exploring and documenting several remote regions of Tibet.