David DiLaura, an emeritus professor at the University of Colorado, was working on his comprehensive bibliography listing every significant scientific volume on optics when he made an unexpected ...

Stocks still haven’t returned to their last peak, and our columnist is in the camp that says this isn’t a bull market yet. But he’s buying stock anyway. By Jeff Sommer The discovery suggests that ...

Isaac Newton is known as one of the most important scientists in history, yet much of his personal life remains surprisingly unknown. He is remembered for gravity, the laws of motion, and calculus, ...