And come on now, be honest! How many of us have actually ridden a bicycle fitted with a headlamp utilising this
phenomenon, as I have in my not all that distant youth?


Not too distant? C'mon, admit it - you're the same LUCY that L.S.B. Leakey dug up in Olduvai Gorge! At the very least, you were around when Rovers and Peugeots all had pedals!