Time traveler's cheat sheet
Have you ever fantasized about traveling back in time a few hundred or thousand years and giving civilization a boost? Here's a poster for you in case your fantasy comes true. You can even get it on a T-shirt.
UPDATE: Some commenters have kindly pointed out that this poster was created by Ryan North of Dinosaur Comics. Thank you, kind commenters!
Time traveler's cheat sheet (Via Bits & Pieces)
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Mark Frauenfelder
My latest book, Made by Hand, now in paperback. Follow me on Twitter.
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