Majungasaurus, may be the ugliest dinosaur yet. At the very least it has a rather distinct face. This cousin of Carnotaurus was up to 25 feet long and weighed close to a ton. It is not considered to be a fast dinosaur, as it's legs were fairly short compared to the rest of the body. Majungasaurus likely couldn't exceed speeds around 15 miles per hour. These dinosaurs are known to be cannibals based on bite marks left on the bones attributed to the same species. They lived on Madagascar 70 million years ago.