I'm a big fan of orienteering, which is the sport of racing using navigation skills and a map and compass. At a recent orienteering event I was wondering why it felt so satisfying to find colored fabric flags out in the woods. I think it's our monkey brains. We've got monkey brains. Not the Indiana Jones Temple of Doom type monkey brains, but brains in our heads that have a lot in common with the brains of monkeys. And our monkey brains love hunting and gathering. Our mon