Guest: Andrew Blum, author and journalist

Intro: Today, we can pick up our cell phone or turn on the TV and find out what the forecast will be a week from now! It is because of a vast global-network of people and technology that weather has gone from something we merely observe, to something we can predict. Today we are joined by Andrew Blum, the author of "The Weather Machine.” In the book, Blum takes a minute to step back, and marvel at this amazing technological achievement. 

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