According to fossils discovered, snakes had back legs for 70 million years. Given that we have legless lizards today, is it really all that surprising? We know that whales had legs once upon a time, too, so why not snakes?
Scientists have always figured that snakes had legs once upon a time. What's new is that they've figured out that snakes likely had them for a long time, not just as an evolutionary phase. The hind limbs were even useful to the snake rather than something they merely had to grow out of using.
Have you read about any other cool evolutionary changes lately? Share your weird animal findings in the chat.