PHOENIX -- Bestselling author, Scott Flansburg, has been teaching math and entertaining people with his astonishing math skills for more than 20 years. Nicknamed, the Human Calculator®, he currently holds the Guinness World Record for adding the same number to itself more times in 15 seconds than a person can do using a calculator.
On Dec. 21 -- the end of the Mayan calendar, which many believe means the end of the world as we know it -- Flansburg will introduce a new calendar. The Human Calendar has 365 days, divided into 13 months of 28 days. What's more, it counts zero as a number, which means there's a month zero.