How much total space did we save by switching to flat screen TVs and monitors? (Thanks to Jalopnik via Robert Friedhoffer for suggesting the question.)

How far does a volleyball travel during a typical volleyball game?

Look for the answers online at under “Browse,” at the very end of the current issue.

Question suggestions are always welcome!

For more Fermi questions and answers, see Guesstimation 2.0: Solving Today’s Problems on the Back of a Napkin, by Lawrence Weinstein (Princeton University Press, 2012).

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