The 10 Ugliest Dinosaurs

By Bob Strauss, About.com Guide

As a whole, dinosaurs weren't the most attractive creatures ever to walk the earth--so it's no small thing to say that some theropods, sauropods and ornithopods were uglier than their contemporaries. Not only were these reptiles afflicted by buck teeth, flabby thighs, and unsightly head growths, but it's not as if they had any recourse to spa vacations or plastic surgery. Here's a gallery of the 10 dinosaurs that were most in need of a complete Mesozoic makeover. (Need to rest your eyes? Visit our list of the 10 cutest dinosaurs.)