/u/Phallic's posts
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Is it likely that most planetary systems have similar configurations to ours, with rocky planets towards the center giving way to gas giants at larger distances?
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How were early identity documents protected against counterfeiting? How did ancient citizens prove their identity?
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Given that "space" is now considered to have properties, and not simply be a vacuum, is it not, in effect, a sort of "luminiferous ether"?
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When comparing the power usage of a permanently illuminated light compared to one that is flashing "on" and "off" regularly, is there a power cost associated with the actual turning off and on of the light?
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