Hipassus & Irrational Numbers: The numbers so dangerous, they threw him into the sea In ancient Greece, numbers were sacred — and every number was a fraction. Then a young mathematician named Hipassus found one that wasn't. What happened next shocked the entire Pythagorean brotherhood. This is the story of √2, a number so dangerous it was kept secret for years — and what it means that some numbers can never, ever be written as a fraction. [https://primemath.io/the-number-that-broke-mathematics/](https://primemath.io/the-number-that-broke-mathematics/)

Archimedes & Integration How do you measure something with no straight edges? No ruler works on a circle. No formula existed — until Archimedes had a breathtaking idea: slice it. Slice it into infinity. In this story, your child will discover the ancient trick that became the foundation of calculus — and still powers everything from GPS satellites to medical scanners today [https://primemath.io/the-shape-that-defied-measurement-how-archimedes-tamed-the-circle-by-slicing-it-into-infinity/](https://primemath.io/the-shape-that-defied-measurement-how-archimedes-tamed-the-circle-by-slicing-it-into-infinity/)