The Toy That Explains the Pythagorean Theorem

Created by Charles Hartenstein, this toy explains one of the most fundamental principles of math using marbles.

Song from π!

This is a song to help me memorize π, since we can memorize music easier than strings of numbers.

Have you seen the optical illusions video that went viral? Prof. Sugihara researches optical illusions in a mathematical way.

Yuki Kawae's videos are also the definition of oddly satisfying. He is designing mesmerizing geometric patterns in his zen garden.

MIT's origami club, OrigaMIT, led the effort to build a Level 3 Menger Sponge out of folded business cards.

Stillness exists in motion. From a new vision, comes a new force that generates a new world. Poemotion is the way to see a new world.

Alice overhears the king and queen arguing that 64 is the same as 65. Can Alice prove the queen wrong and escape unscathed?

It's a really good thing to look at if you want to get an idea of how time/space is curved. Really nice geometry.

You and nine others have been abducted by super-intelligent alien commanders and they give you all a test. Can you solve this hat riddle?

How do you prove that the square root of 2 is irrational? The proof that √2 is indeed irrational isn't that difficult to follow.