POWER TO THE PEOPLE

摘要

Lighting is more than illumination. I'm going to talk about lighting which is for people. We need light; we need to be able to see. There is a little species of mole which lives underground and it is very happy; it does very well. And it is totally blind; it needs no light at all. So, if it developed like we did and became a bit brainier, then we'd never have had lighting, because we wouldn't have needed it. But we, on the other hand, we did develop, and we chose caves. Perhaps the greatest invention we ever had was the control of fire, and we learned how to make fire to give us light and warmth.