An eight-foot Terror Bird with a head the size of a horse, a giant venomous lizard called Megalania and an aquatic scorpion the size of a human being. These aren’t fantasy creatures but rather some of the most brutal predators to ever walk the face of the Earth. TOP TEN DEADLIEST BEASTS will count down the 10 most lethal animals in all of history, with computer-generated imagery showing these killers as they were in all their glory.