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Can You Solve Isaac Newton's Tree Puzzle?

This week’s puzzle is not about gravity, though you’d be excused for suspecting as much. After all, when most people read “Isaac Newton” and “tree” in the same sentence, they think also of falling apples. But this week’s puzzle, which is widely attributed to Newton, is actually an exercise in orderly arboriculture. » 7/26/15 4:20pm 7/26/15 4:20pm

The 10 Weirdest Calculations You Can Make Online Right Now

Chances are, you've used one of the many useful calculating tools available online: How much would a monthly mortgage cost me with today's interest rates? What time is it on another continent? But there are far more exotic and weird calculators on the Internet. Here are ten of the most unusual. » 4/23/14 5:38pm 4/23/14 5:38pm