A macaque works with a touch-screen during training at the Lincoln Park Zoo. (Credit: Lincoln Park Zoo)
Akita, a 10-year-old Japanese macaque, sits in a glass booth calmly tapping away as colored dots flash on a video touch-screen anchored to a wall in front of him. Red, blue, yellow - he picks the dots in the requisite order, then grabs for his reward: fresh blueberries that pop out of a tube onto the floor next to him.
