Hemos from the hardcore-spelunking dept.
DiniZuli writes "Australian Alan Warild led a 25-strong team of cavers from Russia and Ukraine on a world-record 1830-metre descent into the Krubera-Voronia cave in Abkhazia, Georgia. Read about it here (sacrifice of goat might be required). Here's a nice map of the cave."
Quantum Mechanics is a lovely introduction to Hilbert Spaces!
-- Overheard at last year's Archimedeans' Garden Party