The study of triangles is about to be simplified thanks to a 3,700-year-old Babylonian clay tablet. The tablet, known as Plimpton 322, which was discovered early last century, demonstrates the study of angles using only simple ratios. According to Daniel Mansfield from University of New South Wales, "It only involves ratios, you don't need to study trigonometry through angles: sin, cosx, tan and irrational numbers. You can do it with just ratios." Interestingly, the tablet also contains the Pythagorean Theorem, who would have lived more than 1000 years AFTER the tablet would have been made. "It's rare that the ancient world teaches us something new." Read the full article here: Were the Babylonians better mathematicians than us?