If all humans died, when would the last light go out?
If all humans died, when would the last light go out? Get a copy of What If? 2 and Randall’s other books at: https://xkcd.com/books
More serious answers to absurd questions at: https://what-if.xkcd.com/
If every human somehow simply disappeared from the face of the earth, how long would it be before the last artificial light source would go out?
Raxkcd LINK