Historically, babies have been thought of as having three functions in life, eating, sleeping and pooping. Instead, what many proud parents of my “baby is an honor student” bumper stickers already know is being scientifically accredited; it is in fact true that infants are world-class explorers, observers and intellectuals. In a study conducted by Laura Schulz and Elizabeth Baraff Bonzwitz at MIT, young children were given a simple experiment involving light and...