Science can learn more from studies of the simple things. Just like on the TV news, where babies, it was finally found, are smart enough to know they’re supposed to learn from people just like them only bigger and with any luck, willing to spend the time. A talking block in two dimensions on a screen can’t fool a baby.
Psychology can learn a lot from simple things as well. Bedhead reveals some level of stress. The tangles correlate exactly; the amount of knotted hair a fairly accurate indicator of knotted nerves, a flattened stick-straight-up tuft would tell of lengthy pondering, and neatly coiffed would mean a mind at peace, or else oblivious.
The Lost Children: A Charity Anthology