Can you actually make a battery by using just rocks and water? As it turns out, the answer is yes! And you can do it thanks to the technology discovered and innovated by hydraulic fracturing. A clever company called Quidnet (based in Houston, TX) has figured out how to use the water pressure (and water) from fracked wells to spin a turbine and create electricity. Drill a hole, pump water down into it, cap it and wait, and then uncork the hole and the pressure pushes the water back out, spinning the turbine. Genius!