I am 10 or 20 or 50 feet underground. It's hard to tell exactly how far I've just climbed down. Once you've slithered into a dark, dirty hole with only a headlamp to light the way, everything starts looking more or less the same. My knees are bruised, and my elbows are scraped. I can feel grit seeping into my contact lenses, and beads of sweat taking leisurely trips down the back of my neck, picking out grooves in the places where a little less... More >>>