Researchers discovered new dinosaur skulls that have a body size similar to a dog. As quoted by USA Today, is expected to come from the beginning of the era of dinosaurs 230 million years ago. The skeleton was uncovered some first signs of scary predators.
Eodromaeus (pronounced ii-o-DRO-mus) murphi small or "the jogger" has a weight of only 10 (4.5 kg) to 15 (6.8 kg) pounds and has a length of four feet (1.2 meters) from tip of snout to tail. The dinosaurs were found at a site in the mountains of the Andes, Argentina 1996. There is also the first time they find eoraptor, (i-oh-RAP-tor) in 1991, which by some parties believed to be the ancestor of all dinosaurs. Newly discovered creatures, which ran using two legs and eat both plants and animals, somewhat shaken early dinosaur family tree.
"This is an early blueprint of the dinosaurs," Sereno said. Some features of eodromaeus - such as hand grip - there are 150 million years later, the tyrannosaurus rex, just before the asteroid hit the earth, "he said. Blow the asteroid's mean mass extinction in 65 million years ago.
At that time, eoraptor marked as predators, the small theropod like eodromaeus. This group includes velociraptor, tyrannosaurus and Giganotosaurus. One segment seems to go in this type of bird. The new findings make clear that roam this planet eodromaeus earlier than eoraptor.