Math: It’s Not Just For Time Travelers

A lot of the kitch out there marketed at would-be time travelers works just as well as apocalypse survival gear. Knowing a few basic equations, or having a copy of “The Way Things Work” can make the difference between rebuild society and living in caves.
Here’s a clever example – a handy t-shirt you can wear with the basics of flight, health, technology and chemistry.

Available from ThinkGeek, fine purveyors of geekwear.

Keep Your Powder Dry,
Green Valkyrye

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