Registrar Abuse Contact Email: Abuse Contact Phone: +1.4806242505 URL of the ICANN Whois Inaccuracy Complaint Form:
Registrar Abuse Contact Email: Abuse Contact Phone: 48 Registry Domain ID: 137506526_DOMAIN_COM-VRSN Whois Information Domain Name: T-REX-RACING.COM Set-cookie: ASPSESSIONIDCQQBTCCD=OHODNCBCBCBODCHBNDNPLMBN path=/ Set-cookie: vsettings= expires=Wed, 1 07:00:00 GMT path=/ Set-Cookie: ASPSESSIONIDCQQBTCCD=NHODNCBCBHFKALOFFJGAGPBL path=/ Set-Cookie: vsettings= expires=Wed, 1 07:00:00 GMT path=/ Set-Cookie: ASPSESSIONIDCQQBTCCD=MHODNCBCIJAEJNLMLLKFOOFL path=/ rex a Run for Its Money" in Scientific American 312, 2, 19 (February 2015)ĭoi:10.HTTP Headers HTTP/1.1 301 Moved Permanently This article was originally published with the title "Hadrosaur Gave T. With a head start and the push of its leveraged legs, the duck-billed dino would live to run another day. rex's size would have easily given it away. But unlike a big, agile cat, which can slink through high grass to sneak up on its prey, T. rex had to nab a hadrosaur was to take it by surprise, Persons notes. (Imagine the effort required to open and close a door if the doorknob were positioned three inches from the hinge.) For the hadrosaur, superior leverage and slower muscle contractions would mean that it tired less over great distances. rex's caudofemoralis muscle to its femur also meant the carnivore had to expend enormous amounts of energy to swing its leg, so it tired quickly. rex.Īn extended race, however, would yield a different result. In contrast, the hadrosaur's similarly sized caudofemoralis muscle was attached much farther down on the femur, making the muscle contraction considerably longer, which in turn made its strides shorter and slower. Short contractions allowed it to take fast, long strides. TRX training is an exercise method shown to improve total body strength, stability, and cardiovascular health. Extrapolating from 3-D computer modeling of modern-day reptiles “means the physical distance the muscle has to contract to swing the leg through a single arc is very, very short,” Persons says. rex fossil impressions show that its caudofemoralis muscles were attached to the femur near the hip socket. Contractions would swing a hind limb backward, propelling the dinosaur forward. The left and right caudofemoralis of theropod dinosaurs were large tail muscles anchored to the upper leg bones. Scott Persons argues in a study about the dinosaurs' caudofemoralis muscles, published in November 2014 by Indiana University Press. rex would win in a sprint, but a hadrosaur would outrun it in a longer race, paleontologist W. Luckily, the layout of a hadrosaur's leg and tail muscles may have helped it escape the massive jaws of tyrannosaur predators. To top it all off, the herbivore was slow of foot. And it was too big to escape by climbing a tree or burrowing into the ground. The duck-billed dinosaur had no horns, armor or tusks for defense when Tyrannosaurus rex was on the hunt.
0 kommentar(er)
