Lagrange Points of the Earth-Moon System. Best explanation I've seen yet.
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Taipei 2001: Curtis and Andy at CKS Memorial Hall
10 Random Photos:
KBCO Go Wizard of Oz
Mt. St. Helens 2005: The Mountain 08
Beijing 2001: Subway Plaque
Yurt Trip 2002: Doug and the Dishes
Table Mountain 2004: 06
Mount Falcon: From Parking Lot
Beijing 2001: Monument to the Peoples Heroes
Australia 2004: Taronga Croc and Jane
Red Rocks 2001: Day 1: Jason Belaying
Moab April 2002: Poison Spider Terry on the Portal