Golden Ratio Explained by Math and Sunflowers

This number, approximately 1.62, has fascinated mathematicians and artists for centuries—but perhaps not for the reasons you think.

Etch A Sketch Calculus Video Gets Kid Into MIT
Iowa teen Dezell Turner's hobby gave this college applications a ser…
Riddle of the Week #55

Difficulty level: Hard

The Hardest Logic Puzzle Ever

Difficulty level: Hardest Ever

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Pi Makes Perfect Sense in These Simple Animations

We all know pi is (roughly) 3.14, but where did that number come from?

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Why Aren't Helicopters Faster?

How physics explains why the fastest car is faster than the fastest helicopter.

The Equation That Produces a Graph of Itself

Tupper’s Self-Referential Formula describes itself, along with pretty much everything else.

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Math Shows Why Speeding Is So Dangerous

A small change in speed can dramatically increase the energy of a collision.

How to Cheat at 'Settlers of Catan' and Never Get Caught

Probability makes this cheat impossible to detect, not that you should do it or anything.

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