Leonhard Euler, a Swiss mathematician who continued to work on complex equations from memory even after he went blind, is honored in Monday’s Google Doodle on the 306th anniversary of his birth. Euler ...

Have you ever been curious about why the number e is so popular in math? Euler’s number, which is an infinitely long decimal, close to 2.71828, pops up naturally in a surprisingly broad range of ...

“Gentlemen, that is surely true, it is absolutely paradoxical; we cannot understand it, and we don’t know what it means. But we have proved it, and therefore we know it must be the truth.” —Benjamin ...