One of the conclusions is that since they dominated the land and prevented the mammals from developing, this indicates that they had equal strength - since a mammal alive today can exert a force 7 times stronger than a cold-blooded reptile of a similar weight
Researchers from Adelheid University in Australia have found new evidence that dinosaurs were warm-blooded like birds and mammals, and not cold-blooded like today's reptiles, as was commonly thought. In a study published yesterday (Wednesday), Prof. Roger Seymour (Seymour) from the School of Earth and Environmental Sciences at the Australian University claims that cold-blooded dinosaurs could not have carried the muscle strength required to devour other animals and exclude the legs of mammals from controlling a ball The land as they did during the Mesozoic era which lasted 180 million years, from 245 million years ago to 65 million years ago.
"Most of what we learned about dinosaurs came from fossils, but the debate over whether these creatures had warm or cold blood is still ongoing," said Prof. Seymour. One of the claims was that the dinosaurs, like the large crocodiles, raise their body temperature to over 30 degrees by lying in the sun and maintain it at night simply because they are large and their metabolism is slow. "They claim that the dinosaurs could have enjoyed a high body temperature without the need to produce the heat in their cells by burning food as warm-blooded animals do."
In his paper, Seymour calculated the muscle strength that crocodile-like dinosaurs might produce compared to mammal-like dinosaurs of similar size. Crocodiles, for example, have a muscle mass that reaches 50% of their body and are considered strong, but a common alligator weighing 200 kg can exert a force with a power of only 14% of the force that can exert a mammal of similar size.
Cold-blooded dinosaurs could not compete successfully against dinosaurs with mammal-like features of a similar size. However, the dinosaurs ruled the land during the Mesozoic era and pushed the mammals of that time into niches. So they had to have greater muscle strength and endurance than if they had a physiology similar to that of reptiles today."
to the notice of the researchers
More on the subject on the science website
- T rex was a hunter and not a scavenger
- The consensus is growing that an asteroid killed the dinosaurs
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I once heard that the concept of warm blood is a misnomer and that every living thing that breathes oxygen emits heat, while the difference is in the heat regulation system - homeostasis. In any case, this information does not clarify anything for me about the meaning of the difference between warm blood and cold blood
I agree with Yigal. This is news that is based on too many unproven hypotheses. It must be assumed that the mammals were pushed into niches, for a start, and for this it must be assumed that the mammals were common before the arrival of the dinosaurs, and even then we cannot prove causality, only a connection between the appearance of the dinosaurs and the escape of the mammals. Also, there is no reference here to the fact that the dinosaurs were certainly significantly larger than mammals at that time. Any reliance on an assumption that derives from a theory that is deduced from a few fossils, and especially from the absence of some fossils, is weak if not meaningless.
There are almost no facts here and the majority is based on imagination. This corresponds to the science of the eighteenth century and below