A fun way to divide a group of trivia enthusiasts is to ask them what the most dangerous animal in the world is. Those who received their formative educations courtesy of childhood favourites such as Jaws or Arachnophobia will probably throw the accolade  to the Great White Shark or some breed of eight-legged creepy-crawly. It’s easy to spot the Discovery Channel fans of the group because they will offer up the slightly-less pedestrian Hippopotamus as their answer. Despite their mostly herbivorous diet and jolly, smiling features, Hippos are extremely aggressive and do indeed claim up to 3000 lives per year – more than any other large animal.