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Woman Swimming, Berlin

Photo: Woman swimming in dark water, Berlin

This Month in Photo of the Day: National Geographic Magazine Features

Neurobiologist Constance Scharff finds inspiration swimming near her Berlin home. Her discoveries trace a thread woven through all creatures: "The genetic hardware a bird uses to learn to sing probably isn't far from what a mouse uses to learn to run a maze, and what you use to learn to speak."

See more photographs from the February 2009 feature story "Darwin’s Legacy."