How have humans evolved to explore?

Evolutionary psychology is a controversial field, and tentative conclusions are often reported simplistically as fact. But in The National Geographic, David Dobbs has taken a measured approach towards explaining research on the genetic, developmental, and evolutionary basis for the human urge to explore. Between recent scientific discoveries, you'll find a wealth of stories about the people who mapped our world, making dangerous journeys to unknown places in a "madness" to explore.