Ryan North's new book, How to Invent Everything, addresses that question that's probably been sitting in the back of your brain since you were a kid: If you got stuck in a previous time period, could you survive on your wits alone? Ryan says yes, so long as you bring a little advice. Also on this episode, field editor James Lynch talks about riding a Boosted Board between New York City and Philadelphia; Roy talks about chopping and seasoning firewood; tech editor Alex George uses a video game to test drive a Maclaren you can't even buy; and the testing table tries out gravity blankets.  

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