When we talked about energy use, he scoffed at how unambitious we humans were, pointing out that we could meet all our current global energy needs by harvesting the sunlight striking an area smaller than 0.5% of the Sahara desert. But why stop there? Why even stop at capturing all the sunlight striking Earth, letting most of it get wastefully beamed into empty space? Why not simply put all the Sun’s energy output to use for life?
