Snakes and Legs
Why do snakes not have legs?
Naturalist's get many questions about "why" things are as they are, and
almost always the answer is: "because it works." Evolution has equipped each
species for survival in its particular niche, and if that body style and
behavior does not work the species will change or disappear. More
specifically about snakes, we can speculate about how they lost legs through
evolution, it probably was so that they can get into places to find food
that are more difficult for other creatures.
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Update: June 2012