So Just Where Does All That IPhone Money Go?
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Video. There are a lot of logistical problems that pop up when you build a 181m structure like the Three Gorges Dam in China's Hubei province. For example, how do ships navigate the sudden extreme difference in water heights on either side of the dam? That's an easy one. You just build the world's largest elevator capable of lifting 3 million kilograms of boat and water.
Want a drone to fly longer and farther? Give it a bigger battery. But that adds weight, which in turn reduces the drone's flight time. It's quite a conundrum. It seems like an unresolvable catch-22, except that someone has finally found a way to use wireless power to keep a drone flying.