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It's a fascinating story or marketing, capitalism, politics and genius. Tesla, Edison, Marconi, what an astonishing era.

Gravity Could Solve Clean Energy’s One Major Drawback I thought this sounded pretty cool thinking. While the wind blows, or the sun shines, use that energy to hoist up huge concrete weights. Once the sun goes or the wind dies down, let the weights drop and the energy used to hoist them up is...