Snakes, 100 million years
Snakes have evolved from 4-legged reptilians, probably from landbound lizards or marine reptiles that are known to have appeared on Earth 100 million years ago. Just like bats, most snakes are small and have fragile bones, which makes it difficult to find their fossils.
You are right Amos, everything was created in 7 days by a magic man in the sky.
Carbon dating is not relevant here since it only can date thing that are 50000 years or younger. There are other methods for older things. The theory of evolution makes sense and can explain a lot of the observations that have been done by scientists.