But there are. We don't need to have all of them to prove the theory. (You seem to think that because we don't have every single one means you can disprove evolution.) We have enough samples to confirm the theory.
Regarding what you said about Ligers, the sterile offspring between the lion and tiger........ its sort of like neanderthal man banging a modern day female: if the female was able to produce offspring, it would probably be a freak with abnormalities.
