Kangaroo, 20 million years
Australia has been home to kangaroos for about 20 million years. The first distant cousins of kangaroos lived in forests when the climate in Australia was wetter, but they went extinct 10-15 million years ago. Another interesting fact about these kangaroo ancestors is that they didn’t hop on 2 legs, but they walked on 4.
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.