The Rule of 72 stems from the mathematics of exponential growth. It’s not perfect—its accuracy wobbles with very high or very low interest rates—but for rates between 4% and 15%, ...

4 mind-bending math experiments that explain infinity. ... Four thought experiments featured in NOVA’s ... then you would be dividing by zero–which is against the rules of mathematics.

Math and sports are expressions of our controlled creativity. Above, Brazil goalkeeper Julio Cesar watches as the ball sails past for an England goal by Frank Lampard during a friendly at London's ...