A viral optical illusion featuring overlapping leaves hides the number “47,” which most people miss at first glance. The ...

Test your observational prowess with a quick optical illusion! You have just five seconds to locate the number 76 hidden within a grid of 67s. This ch ...

About a year ago, the theoretical chemist Salvatore Torquato met with the number theorist Matthew de Courcy-Ireland to explain that he had done something highly unorthodox with prime numbers, those ...