The year 2015 brought us the Apple Watch, the rise of the "hoverboard" (but it doesn't really hover, we know), lots of stories about virtual reality and self-driving cars and data breaches and encryption and copyright. ... Well, you get the point.

NPR delivered a few quirky stories, too, and we've selected a few of the ones with memorable factoids (some of which were among All Tech's top read posts) and turned them into a quiz. Do you think you can figure out the answers?

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