Religious stories may tell how “wicked” snakes were cursed and lost
their legs, and evolutionary biologists do believe snakes once had legs.
However, this change was likely spurred on by environmental pressures
and natural selection-limblessness offered an advantage.
More advanced snake species like vipers lack any remaining vestigial
limbs. However, more primitive serpents (like constrictors) retain a
pelvic girdle. This still supports small leg bones and tiny claws.
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