ABSTRACT
According to myth, Isaac Newton was sitting under an apple tree when, upon being hit on the head by a falling apple, he discovered the law of gravity-implying the knock on the head produced the žash of insight. (Apple falls-boink-light bulb lights up above head and, hmm, it appears that the ground is exerting a force on the apple pulling it downwards.) Of course it was not that simple. Newton was not the ‚rst human to ever notice that things fall down! His insight was much more impressive than that.
