What makes you think so? Evolution
predicts that snakes evolved from creatures with legs, like many legless lizards; some contemporary snakes have vestigial internal leg buds, and fossil snakes have been found with hind legs, so we would expect to find fossil snakes with four external legs, so that fossil
could well be an early snake - although the jury is still out; to quote National Geographic:
"It’s certainly possible that
Tetrapodophis could be something else. In the squamates alone, a snake-like body has independently evolved at least 26 times, producing a wide menagerie of
legless lizards. These include the
slow worm of Europe, and the bizarre
worm-lizard Bipes, which has lost its hind legs but has kept the stubby front pair. True snakes represent just one of these many forays into leglessness."
But supposing it is a snake - is the suggestion that this fossil is an example of snakes before God cursed them to crawl on their bellies? If so, we should be able to put an earliest date on the biblical story; and what about the fossils of snakes with only hind legs - did God get bored halfway through?
Or are they all just another example of evolution in action?
Not at all - if verified, it will be embraced as yet another confirmation of a prediction of evolution.