/u/[deleted]'s posts in /r/askscience
If light travels in a straight line, why aren't there gaps between rays of light if the source is far away?
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If you subtracted the actively emitted light from the Sun, what colour would it appear to be if you shone a standard white-to-human-eyes light on it?
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How did animals that evolved after the split of Pangea, such as canids and felids, populate both the New World and the Old World? Did they all cross the Bering land bridge?
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If a city replaced all of its lightbulbs to produce a more narrow frequency range of light, how much light pollution could be removed without making the lights useless?
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