Nieman Storyboard gives the annotation treatment to Mary Roach's 2008 National Geographic story on the chimps of Senegal and what their tools can teach us about human evolution. On her use of metaphors, like comparing salt stains on sweat-drenched shirts to those on a snowy winter's boots, Roach says, "It’s the part of writing that I love. Knowing there’s a good sentence to be had, and mucking around til I get it right. And the fleeting satisfaction of nailing it."
