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Dark matter obeys gravity after all — could that rule out a 5th fundamental force in the universe?
Scientists have discovered that dark matter, the universe's most mysterious "stuff," obeys gravity on vast cosmological ...
18hon MSN
How do airplanes stay up in the sky? 4 forces of flight every aviation enthusiast should know
Aerodynamics explains how airplanes fly through the interplay of four fundamental forces: lift, weight, thrust, and drag. Lift opposes gravity, thrust propels forward, and drag resists motion. Pilots ...
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