A professor has discovered 2 skulls from the first known mammal of the early Late Cretaceous period of South America. This discovery provides new clues on the early evolution of animals. This new mammal looks like a sabor-tooth squirrel and its called Cronopio. Cronopio was shrew-sized, about 4-6 inches in length, and was an insectivore with a diet of the insects, grubs and other bugs of the time. This discovery was so important because it was the first time they found this type of mammal.
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