The good side of the internet.

The Circle That Isn’t ThereThere is no circle in e^(−x²), and no elementary antiderivative either. Square the integral, move to the plane, switch to polar coordinates — and π walks out in four lines.

Alexander Graham Bell’s Tetrahedral Kites: The Fractal He Flew Before It Had a NameAfter the telephone, Bell spent years on a Nova Scotia hilltop sending red-silk pyramids into the sky. He stopped enlarging the kite and started copying it — and flew a Sierpiński tetrahedron decades before mathematics named it.

What Is Mathematics Good For?Nobody loves music because it is useful. Nobody plays football because sport is good for you. A manifesto on why mathematics is good for nothing — and, for that very reason, good for everything.

Napier’s Bones: The Calculating Rods That Multiplied Before Machines DidIn 1617, a dying Scottish laird described a handful of ivory rods in his final book. Those rods became the pocket calculator Europe carried for the next two centuries.

Marie Curie's Radioactive NotebooksMarie Curie's laboratory notebooks are still radioactive a hundred and thirty years later. The National Library of France keeps them in lead-lined boxes. To turn the pages, you sign a waiver first.

Here’s Looking at Euclid: Helen Friel Folds Byrne’s Proofs into PaperIn 1847 Oliver Byrne turned Euclid’s proofs into coloured figures. A hundred and sixty-five years later, paper engineer Helen Friel lifted those same figures off the page and folded them into three dimensions.