"Grand Canyon: The First Journey" (National Geographic Channel, 9-10 p.m.
E/P) This documentary follows a one-armed Civil War Veteran and nine crew member (3 of whom perished during the expedition) on the first scientific
exploration of the Grand Canyon in 1869. Another reminder that those "survivor" shows on TV these days are bogus.
"Caves" (The Learning Channel, 10-11 p.m. E/P) More geography, geology and biology. This documentary explains how caves are formed and examines the life forms that inhabit them.