重力能维持我们的海洋吗？驳斥地平说迷思

📝 事实核查: Gravity is proportional to mass. The oceans have an extraordinarily large mass, so the Earth's gravitational pull on them is massive. A butterfly, smoke, or a glass of water has very little mass, meaning the gravitational pull on them is tiny. Butterflies overcome this small force using aerodynamic lift generated by their wings. Balloons and smoke rise due to buoyancy—they are less dense than the surrounding air, so the heavier air displaces them upward. Lifting a glass of water simply requires your muscles to exert a force greater than the tiny gravitational pull acting on that small volume. 🌊🦋

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