Lalieudorhynchus might have had a hippo-like lifestyle, spending much of its time in water.

Mammal ancestor looked like a chubby lizard with a tiny head and had a hippo-like lifestyle

An animal that lived before the dinosaurs looked like a rotund lizard with a very small head and had a hippo-like semiaquatic lifestyle, according to fossils that were recently excavated in France. The amphibious animal, which represents a previously unknown genus and species of mammal ancestor, measured about 12 feet (4 meters) long, researchers reported …

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