Since we know that a young earth really is impossible and no one wants to even challenge that fact, let's talk about caves.
Some time ago I came across an article asserting that three human skeletons were recovered from one of the underwater caves that lace the Yucatan Penninsula. They dated from about 5000 years before Creation or about 11,000 BC. I haven't been able to find anymore about them. Do you know anything about such a find? IIRC, FSU was involved.
Aslan is not a Tame Lion