How have I not seen this Time Traveler's Cheat Sheet? And what's a Time Traveler's Cheat Sheet? It's a pithy summary of how to recreate modern technology, from creating the compass, to investing pasteurization, to E=MC2. And it's awesome.
(Click to enlarge)
I give you the ultimate summer project for your teenager: recreate (and of course, blog about), as many items on the list as possible.
Oh, I get it. The author created it recently, and then went back to 2009 to post it.
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