A 113 million-year-old Brazilian fossil, recently examined for the first time, has provided what some experts believe is the first evidence that snakes did at one stage in their evolution have four legs. While there is some controversy as to how closely related to modern day snakes the fossil is, the authors of a new study that examines the fossil are certain this proves snakes have always been land-based animals, using the delicate limbs for burrowing and “hugging” their prey, rather than for swimming.
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