The simplest questions are often the best. Robert P Crease tries to answer one from a physics student in Kenya Seeking perfection Tennis balls are a low-cost way to explore simple physics concepts, ...

Between the summer of 1665 and the spring of 1667, Isaac Newton developed his theories on calculus, optics, and the laws of motion and gravity. He was quarantining during the Bubonic Plague and found ...

The novel coronavirus has derailed everyday existence for all of us, forcing us to make difficult choices. But a few weeks ago, Stephen Wolfram’s dilemma was unique. What should you do, he wondered, ...