A 500-year-old mystery hidden in one of the world’s most iconic drawings may have just been cracked—by a London dentist. A ...

Jeff Smith's Math Puzzle for November 21, 2025 - ‘We fired our cannon 'til the barrel melted down, so we grabbed an alligator ...

You are participating in a holiday gift exchange with a few classmates. You each write down your own name on a slip of paper and fold it up. Then all the students place their names into a single hat.

The Riemann Hypothesis is one of the most famous problems in that set. It’s about prime numbers. That’s any whole number that can only be divided by 1 and itself – like 2, 3, 5, 7 and 11.

A historic capex surge, thin AI revenues, and extreme index concentration leave investors one disappointment away from a ...