Men, women, sex and Darwin / Natalie Angier -- Back to the land / Wendell Berry -- Africa's wild dogs / Richard Conniff -- http://www.when_is_enough_enough?.com / Paul De Palma -- Something happened / Helen Epstine -- Under water / Anne Fadiman -- The cancer-cluster myth / Atul Gawande -- That sense of falling / Edward Hoagland -- A new germ theory / Judith Hooper -- Heavy grace / Wendy Johnson -- The wisdom of toads / Ken Lamberton -- The island at the end of the Earth / Peter Matthiessen -- Lulu, queen of the camels / Cullen Murphy -- The demon in the freezer / Richard Preston -- Brilliant light / Oliver Sacks -- This is not the place / Hampton Sides -- Gorilla warfare / Craig B. Stanford -- String theorists find a Rosetta Stone / Gary Taubes.