@gzreel: How China's Three Gorges Dam Literally Slowed Down the Earth. Yes, you read that right. China's Three Gorges Dam—the world's largest power station—holds so much water (39.3 billion cubic meters!) that it shifted Earth's mass enough to slow our planet's rotation by 0.06 microseconds. Confirmed by NASA, this mind-bending effect is due to increased moment of inertia. While it won't change your day, it's a stunning reminder of how human engineering can echo at a planetary scale.