1. Humans: We have a tailbone (coccyx) which is a remnant of the tail found in our primate ancestors. It serves no real function today, but it's a clear indication of our evolutionary past.
2. Whales: Whales possess pelvic bones and femur bones within their bodies, despite lacking hind legs. These bones are small and don't connect to anything, but are remnants of the legs that their land-dwelling ancestors possessed.
3. Snakes: Some snakes retain tiny pelvic bones and femur bones hidden within their bodies. These bones are vestigial remnants of their ancestors, which were four-legged reptiles.
Let me know if you'd like more examples!
