Why are birds the last dinosaur?

The brains of modern birds are among the largest and densest in life (in proportion to their size!) This characteristic may explain why they are the only dinosaurs to have survived, according to a team of University of Texas paleontologists. show in their study published in Advances.

To reach this conclusion, the researchers looked at a fossil ofichthyornis, a Cretaceous bird (145 million years to 66 million years before our era) native to North America, did not survive the Great Extinction characteristic of the end of this period. This species is considered one of the closest relatives of modern birds (birds) However, researchers believe that it would be more anatomically similar to the first feathered dinosaurs than to modern birds, which tells us about the uniqueness of the latter.

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