6. Triceratops
According to Britannica, when the first Triceratops was found in 1887, it was thought to be a giant, extinct species of bison. You can’t fault the misconception too much: squint, and it makes sense. The prominent horns provided defense against predators—some Triceratops have been found with bite marks that match the maws of tyrannosaurs—but they were also used to fight each other, as Gizmodo recently reported. Simply put, the hornier the dinosaur, the better. So the three-horned Triceratops is one of the best.
