This is more than just a math book! Showing math in a practical light, it's a fascinating look at the development of everyday math principles through history. Do you know why ten days vanished in 1752? Do you know what invention caused the world to be divided into time zones in the nineteenth century? Do you know the mathematics principle behind Da Vinci's Last Supper that makes it pleasing to the eye? This book covers it all, from the early Egyptians to the space age.