How to move a sofa in tight spaces

This post isn't new, but it still may be of interest if you are a college student or live in a Manhattan apartment. The smart folks at Mathcad Library have figured out a geometric formula for moving a sofa around a tight corner.

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Why do so many of us still buy cars with off-road abilities?

Cities are full of cars like the Subaru XV that can drive off-road but will never see any challenging terrain. What drives us to buy cars with these abilities when we don't really need them most of the time?

by Drew Stearne