Young dinosaurs crawling on all fours, just like people
Every child, before the walk passes through the stage of crawling on all fours - oddly enough, this feature of the development may boast, not all of the animals. Paleontologists from the University of London, studied the remains of the newborn, one year old and adult dinosaur mussaurus (Mussaurus patagonicus) and found that in the first months of his life he could not fully walk because of uneven weight. It turns out that, like people, while he had to crawl on all fours.
The considered view of dinosaurs lived about 200 million years ago in present-day Argentina. Palaeontologists are very lucky - for the past 50 years they have managed to collect the fossils of ancient creatures of all ages. According to Professor John Hutchinson, thanks to these remains mussaurus, they were able to make a discovery that 20 years ago it was still impossible.
According to their calculations, the baby dinosaur weighed 60 grams and can fit in the palm of a person. At this age, things were relatively large head and neck, but well-developed forearm - the center of his body weight had been sent ahead, so young could only move on all fours.
The situation changed as they grow older - when the increased dinosaur tail moved the center of gravity in the pelvis, he could stand on two legs. According to researchers at the stage of growing dinosaur had already almost 6-meter long and weigh more than 1,000 kilograms.
Due to the lack of fossils of other dinosaurs with long necks, paleontologists can not say for sure whether they are going through the same stage of crawling. Probably most of them have walked on all fours all his life, not getting up on two feet because of the severity of the long neck. Exceptions could be considered mussaurus, Iguanodon and psittacosaurs.
The new discovery has made it clear that the possibility of walking on two legs played a role not only a balance between the length of the hind and front legs, but also the length of the tail and neck. On the basis of this knowledge, paleontologists can reveal features of the development and other types of dinosaurs.
On the topic of dinosaurs also encourage you to read material about how they learned to fly. To give an answer to this question helped robotic skeleton Caudipteryx predator.
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