Decipher the mystery of the dinosaur's blood

Researchers eventually found a satisfactory answer to the long-standing question that dinosaurs are warm-blooded animals like birds and mammals, or cold-blooded reptiles, fish and amphibians. .

Dinosaurs used to be terrestrial animals until a meteorite erased existence on Earth 65 million years ago. Scientists evaluated the metabolism of many dinosaurs, using a calculation formula based on their body mass. Body masses of dinosaurs are revealed through the size of femur as well as their growth rate, expressed by growth rings in fossil bones (similar to growth rings in stems). .

The team evaluated 21 dinosaurs, including predatory "monsters" such as Tyrannosaurus and Allosaurus, long-necked dinosaur Apatosaurus, Tenontosaurus duck-billed dinosaurs and Troodon dinosaurs, and compared them. Results obtained with the results of a series of mammals, birds, fish bones, sharks, geckos, snakes and crocodiles.

The growth and metabolism of dinosaurs is not the same as warm-blooded or cold-blooded.(Photo: newsapace.com)

Ecology and evolutionary biologist Brian Enquist of the University of Arizona (USA), said: "Our comparative results show that dinosaurs have true growth and metabolism. They are typical for warm-blooded or cold-blooded animals, they do not occur as in mammals or birds, or reptiles and fish, instead they have a growth rate and intermediate metabolism between them. "Hot blood creatures and cold-blooded creatures today. In short, dinosaurs that once possessed physiological characteristics are not common in today's world . "

In the research world, there has been a persistent debate about dinosaurs being cold-blooded, slow-moving animals and sluggish as scientific proposals for the first time in the 19th century, or warm-blooded animals with unique physiological characteristics.

When scientists unearthed more dinosaurs that looked more agile like the Velociraptor dinosaurs, some experts voiced their support for the idea that dinosaurs have warm blood and are as fast as animals have. breasts and birds. The recognition, birds evolved from small, feathered dinosaurs seems to have reinforced this view.

Biologist John Grady of the University of New Mexico (USA) claims, the idea that dinosaurs are either cold-blooded animals, or warm-blooded animals, are too simple when we look at them all the time. long. Like the dinosaurs, some of the animals that live on Earth today like giant white sharks, leatherback turtles (also known as leather turtles) and tuna don't easily fit into any sort of category. .

According to Grady, the best answer is, dinosaurs are animals in the middle of warm-blooded and cold-blooded . Immediate metabolism may have allowed dinosaurs to grow in size much larger than any other mammal.