Unseen World on Instagram: "📌More Info⏬ This structure is so massive it can actually slow the planet’s spin 🌍⏳. China’s Three Gorges Dam holds back more than 39 billion tons of water, creating such an enormous redistribution of mass that it slightly alters Earth’s rotation — by about 0.06 microseconds per day ⚡💧. That may sound tiny, but on a planetary scale, it’s incredible. The sheer weight of the stored water shifts Earth’s moment of inertia, subtly changing how fast our planet rotates. It