thank you for the correction it was 65 million years. But surely 65 million years it would have showed some change no ? And surely they would have found others. They said it went extinct and they were wrong.
Not necessarily. Evolutionary theory says things may change, not that they must. Sharks, for example, have changed very little over the eons.
The fact that they were wrong about extinction is just a distraction, because it has nothing whatsoever to do with the veracity of evolution. All that it proves is that it's easy to hide in the ocean.