Randall Munroe, the man who writes web comic xkcd, also runs a series called What If in which he offers the answer to questions using data gleaned from the web and physics. On Tuesday the he tackled the question “If all digital data were stored on punch cards, how big would Google’s data warehouse be?” The result is a speculative blog post that estimates Google’s server count (between 1.8 million and 2.4 million) total storage (10 exabytes) and tells you how to find the search giant’s secret data center locales (go read it to find out.)

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