Trade paperback. A history of humanity told through 17 defining equations, from Pythagoras to Calculus. From the author of the "Cabinet Of Mathematical Curiosities" and "Hoard Of Mathematical Treasures", which have sold over 100,000 copies in 2 years. Stewart explains how Pythagoras's Theorem led to GPS and SatNav, how logarithms are applied in architecture, and why imaginary numbers were important in the development of the digital camera.