China has already altered the Earth’s rotation with a mega infrastructure project and is now planning a project that will triple the power of the Three Gorges Dam

ne giant dam has already nudged the way our planet turns. When the enormous Three Gorges Dam reservoir in China filled with tens of billions of tons of water, NASA calculations showed that the extra mass made each day about 0.06 microseconds longer and shifted Earth’s rotation axis by roughly 2 centimeters. Now Beijing is moving ahead with an even more ambitious project on the Tibetan Plateau. A new hydropower complex planned for Medog County in Tibet is expected to become the largest dam system on the planet, with an annual output roughly three times that of Three Gorges and...