Diplodocus, the "double-beam," is one of the most famous dinosaurs in the world. This 24-meter-long, four-meter-tall dinosaur can be found in dozens of museums worldwide, making "Dippy" recognizeable everywhere. Its absurdly long tail is perhaps its most iconic feature: it tapers to a flexible "whip-like" end, which some enthusiasts speculate could have been used as a real whip against predators. This tail also functioned as a counterbalance to the massive, heavy neck that stretched from the front of its body. While some sauropods like Brachiosaurus had longer arms than legs, giving them more vertical postures, Diplodocus's arms were shorter, giving it a horizontal posture. This hefty herbivore browsed the Jurassic foliage of semi-arid coasts in what is now the central United States. Diplodocus lived alongside several other sauropods, including Apatosaurus and Camarasaurus, so the landscape must have been constantly altered wherever these hungry diners stopped to enjoy the buffet. Based on the shape of their teeth, paleontologists can tell that each species of sauropod ate a different kind of plant in order to avoid competition with each other. Many predators (such as Allosaurus, Ceratosaurus, and Torvosaurus) also shared the same habitat with these sauropods, and would have had to eat different prey to avoid competition as well.