The cool thing about snakes vs legless lizards is how legs are a trait that animals evolve out of and then evolve back into multiple times through their evolutionary history Same with cetaceans (originally coming from the fish form factor and then going back to it)https://twitter.com/Faith_Salie/status/1366576401017626624 …
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All "land animals" (tetrapods) started off as fish who grew legs (hence the name) Snakes did, in fact, start as some kind of lizardlike thing that lost its legs before it evolved most of the other traits that make lizards lizards
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"Legless lizards" as distinct from snakes just ditched the legs later on in their history And the cool thing about them is this didn't happen just one time -- the different families of legless lizards lost their legs in independent evolutionary events
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Replying to @arthur_affect
There are certainly a lot of cases of secondary leglessness, but I can't think of any examples of legless tetrapods growing back into legs. Are there?
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