If there is a habitat, something will evolve to exploit it.

system in the first place without a visible path for them to make the journey during an ice age with the extreme cold and ice that must have been around in the area at the time let alone survive there.

This fish found in Mammoth Cave appears to have been underground long enough to lose its eyes.

I found ants in a cave I was exploring. The crayfish lives up to seventy years.

I've actually seen eyeless crayfish - I think it was in Horse Cave. We love exploring the local caves.

There's one here on the property that leads to an underground river - you have to lower yourself into it with a rope and then crawl on your belly to explore the deeper recesses. It's full of all kinds of neat critters but so far I haven't seen any new species.

Squire Boone had a long tube ending in a three step waterfall one had to climb to gain access to the cave. Ladders were used to access the cave. One of it's features was travertine formations. It's commercial now.

A lot people think caves are just dark damp holes in the earth - they have no idea how many are home to fragile and unique ecosystems.

I remember the millstone nearby the ruins of his mill. I wonder if his brother Daniel ever visited there and explored the cave?