Random Thoughts on Life

Everyone always comments about the similarities between babies and the elderly: the drooling, the diapers, the slurred/incomprehensible speech, etc., etc., etc. But with the amount of walking we did on our holidays this one really came to mind:

At what point do children learn to look where their going, instead of walking forward with their head turned to the side, and at what age to people unlearn to look behind them when their backing out of parking lots and driveways?