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Gilligan wrote:
http://www.dailymail.co.uk/pages/liv...n_page_id=1770

I think that parts of Mars look very much like Karst areas (this means
caves) so I tell my kids that some day they will be able to explore
caves on Mars. My 9 yr old daughter told me last time we went caving,
"Daddy, I wont like it when the rocket goes so fast because it might
explode". However, she was up for exploring caves there. I might be
young enough to explore lava tubes on the moon when we finally get back
there but the martian caves will have to wait for my kids.


Have you done any spelunking in Tennessee, Kentucky?