His lecture at the Royal Institution is better and more in depth. https://youtu.be/xRel1JKOEbI https://youtu.be/xRel1JKOEbI Worth a watch if you have an hour

His lecture at the Royal Institution is better and more in depth. https://youtu.be/xRel1JKOEbI https://youtu.be/xRel1JKOEbI Worth a watch if you have an hour to spare.