Randall Munroe: Is It Possible To Change The Moon’s Colour?

If everyone on earth aimed a laser pointer at the moon, would we see it change colour? Randall Munroe, creator of the webcomic xkcd, talks us through the laser light calculations – and concludes that we shouldn’t be afraid of asking stupid-seeming questions…as sometimes they can lead you to a lot of fun places.

This episode originally aired August 8, 2016.

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