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/r/askscience

We have hot air balloons, and helium balloons but why not hot helium balloons?

1876 upvotes • dredawg1
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Why do turbofan engines have 2 shafts, 1 for the main fan and low pressure parts, and then another for the high pressure compressor etc. Why cant it all be on one shaft?

1876 upvotes • Fennahh
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Why is Supercritical Water Non-Polar?

1874 upvotes • Aijol10
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When a human steps on an anthill, what exactly starts going on down there?

1873 upvotes • antq
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What's CERN doing now that they found the Higgs Boson?

1872 upvotes • ttamimi
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Why can't tangential velocity at the tip of an airplane propeller exceed the speed of sound?

1872 upvotes • eldiab10
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Why it's 0^0 indeterminate?

1872 upvotes • iwantatrophy
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Are the signals for pain distinctly different from other feelings?

1872 upvotes • bagelbomb
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Does the brain react differently to text read on a digital screen rather than printed on paper?

1871 upvotes • easy_Money
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Why are mice euthanized with CO2 rather than N2 or NO?

1870 upvotes • psycadelia
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