If there’s one thing we can be sure of, it’s that good ideas have a tendency of occuring to more than one person at around the same time … which is what patenting was created to deal with, but I’ll leave that can of worms for smarter people than I to open. But, to illustrate my point – remember the guy who made himself a solar furnace with old aluminium drinks cans? Well, out in some remote part of China, a farmer has made a solar water heater out of empty glass bottles which provides enough hot water that his whole family can shower every day. Human ingenuity is a wonderful thing.