Harvard physicist Lisa Randall thinks the answer may be dark matter. This is an excellent video. At approximately 79.5 million years old, … If you know the answer to this question, please register to join our limited beta program and start the conversation right now! The earliest Dinosaur is Herrerasaurus from the late Triassic: The main characteristics that set apart the dinosaurs, are the evolution of fully erect, bipedal locomotion: 1. As a Christian, it was helpful to me to watch a scientific discussion about the dinosaurs. CoCo Cars Recommended for you Bipedal dinosaurs include some of the scariest dinosaurs that ever roamed the earth. Cabazon Dinosaurs, formerly Claude Bell's Dinosaurs, is a roadside attraction in Cabazon, California, featuring two enormous, steel-and-concrete dinosaurs named Dinny the Dinosaur and Mr. Rex. My friends and I created Big Word Club to help parents and teachers improve their kids' vocabularies in fast and fun ways because we … (By the way, some experts insist that the biggest meat-eater was the South American Giganotosaurus, which may have matched, and occasionally even outclassed, its northern African cousin.) We need you to answer this question! Though the largest dinosaur has not yet been named, Dr Ruden Cuneo the director of Museum where the fossils are now housed said they would choose a name that refers to the geographical area from where the dinosaur was found. This lesson will define the word bipedal, and then will highlight some truly amazing bipedal dinosaurs. Technically, ornithopods include another type of plant-eating dinosaur, hadrosaurs. The dinosaur, named Thanatotheristes degrootorum, is the first new tyrannosaurus species to be discovered in Canada in 50 years. Are dinosaurs real? The mass extinction that wiped out the dinosaurs was triggered by a massive asteroid that slammed into Earth 66 million years ago. Dinosaurs belong to a group known as archosaurs, which also includes modern crocodilians. Dinosaur legs extend directly beneath the body, whereas the legs of lizards and crocodilians sprawl out to either side. While what we think of as dinosaurs existed between 245 million and 66 million years ago, all you need to do to catch a glimpse of their descendants is take a look in your backyard. Welcome to Big Word Club! Dinosaurs . They were fiercesome meat eaters like which included tyrannosaurus and giganotosaurus. And not only was Spinosaurus big, but it was agile as well: recent evidence points to it being the world's first identified swimming dinosaur. The creature depicted joining the fray here is clearly a bi-pedal dinosaur with a distinctive head crest, a terrible aspect, and two huge thighs. One of the things that make dinosaurs so appealing to kids and adults is their sheer size: plant-eaters like those of the genera Diplodocus and Brachiosaurus weighed in the neighborhood of 25 to 50 tons (23–45 metric tons), and a well-toned Tyrannosaurus Rex or Spinosaurus genus members tipped the scales as much as 10 tons (9 metric tons). A very well preserved complete hadrosaurid specimen, AMNH 5060 (Edmontosaurus annectens), was recovered in 1908 by the fossil collector Charles Hazelius Sternberg and his three sons, in Converse County, Wyoming.It was described Henry Osborn in 1912, who dubbed it the "Dinosaur mummy".