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[What If?] Would a Submarine Work as a Spaceship?
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What if you swam in a nuclear storage pool? | xkcd What If?
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youtu.be
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What if we aimed the Hubble Telescope at Earth?
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Could you make an umbrella out of lasers? [What if]
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What if NASCAR had no rules?
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What if you threw a baseball at nearly light speed?
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What if Earth suddenly stopped spinning?
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What would a magnitude 15 earthquake be like?
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