/r/askscience
Is there any mathematical proof that was at first solved in a very convoluted manner, but nowadays we know of a much simpler and elegant way of presenting the same proof?
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Is it likely that dinosaurs walked like modern day pigeons, with a back and forth motion of their head?
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Are the nearby airplanes cleared of the sky when launching Falcon Heavy? I was checking Flightradar24 when launch occurred and didn't see any difference. Also, 3 boosters landed back successfully. I assume the sky has to be clear of airplanes to avoid any potential collision?
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Why do current-carrying wires have multiple thin copper wires instead of a single thick copper wire?
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How can a Black Hole have rotation if the singularity is a 0-dimentional point and doesn't have an axis to rotate around?
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Why is the gravitational constant, a value that is fundemental to so many fields of science, only know to within 4 significant digits? What about this figure is so intrinsically difficult to measure?
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