Here's a stumper: How many parts can you divide a line into? It seems like a simple question. You can cut it in half. Then you can cut those lines in half, then cut those lines in half again. Just how ...

FARADAY, describing his experiment which established a fundamental law of electrical science, — the induction of electric currents, — was asked, ‘What use is it?’ To which he gave the classic ...

Infinitesimal: How a Dangerous Mathematical Theory Shaped the Modern World, by Amir Alexander Robyn Arianrhod on a compelling tale of Jesuits, geometry and heresy in the turbulent 17th century ...

Modern scientists have been able to study ever smaller particles of matter. Recently the pursuit of the infinitesimal reached a new vanishing point. An R.C.A. microphysicist developed an instrument ...