Travel through time with the maestros as they explore the amazing history of timekeeping!Did you know that there is more than one calendar? While the most commonly used calendar was on the year 2000, the Jewish calendar said it was the year 5760, while the Muslim calendar said 1420 and the Chinese calendar said 4698. Why do these differences exist? How did ancient civilizations keep track of time? When and how were clocks first invented?Find answers to all these questions and more in this incredible trip through history.
Childrens-Books, Science-Nature-How-It-Works, Astronomy-Space, Astronomy,