Add Yahoo as a preferred source to see more of our stories on Google. A variation of a puzzle called the “pick-up sticks problem” asks the following question: If I have some number of sticks with ...

“Do you see the pattern? Each number in the series after the first two numbers is the sum of the preceding two numbers.” That’s how I began my last column focusing on the Fibonacci sequence, which ...

Pine cones. Stock-market quotations. Sunflowers. Classical architecture. Reproduction of bees. Roman poetry. What do they have in common? In one way or another, these and many more creations of nature ...