Four-legged fossil suggests snakes evolved from burrowing ancestors

The discovery of a four-legged fossil of a snake hints that this suborder may have evolved from burrowing, rather than marine, ancestors. The unique four-legged specimen, found in Brazil's Crato Formation, provides us with more insight into how these creatures transitioned into the sleek, slithering reptiles that we are familiar with - and often fearful of - today.

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