The Cretaceous–Paleogene mass extinction brought about by a huge asteroid 66 million years ago caused around 75 percent of all species to go extinct which gave primordial snake species an opportunity to flourish. (From 2021)
, snake biodiversity began increasing shortly after the Cretaceous–Paleogene mass extinction—you know, the one brought about by a huge asteroid impact 66 million years ago. The asteroid caused around 75 percent of all species, and all of the non-avian dinosaurs, to go extinct., a trusted source for technology news, tech policy analysis, reviews, and more. Ars is owned by WIRED's parent company, Condé Nast.
As it turns out, snake fossils are hard to come by. It’s rare to find any great snake because their bodies are loosely articulated and can fragment quickly. “They’re really rare in the. And when we do see them in the fossil record, it’s usually just a bit of vertebrae, often not really a skull, so we can’t get a sense of their ecology,” Grundler said. “It’s not something like a big mammal or a big dinosaur that has four limbs, and the bones are pretty robust.
According to the researchers' model, the most likely common ancestor for all existing snake species was an insectivore. Prior to the mass extinction, there were probably snakes that ate rodents and other animals. After the asteroid hit, however, those beasts likely died off, although this is still uncertain, Grundler said. “What we get from the model is like a best guess,” he said.
The research also suggests that the increase in snake biodiversity slowed down for most snake species as they settled into their new habitats. However, the species that reached new locales continued to adapt in different ways.
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