The Mayan calendar’s 819-day cycle has confounded ... matching up multiple planets into an 819-day span didn’t seem to make sense. But it does when you look at it over 16,380 days (roughly ...

Save guides, add subjects and pick up where you left off with your BBC account. Maya farming was successful because of the accurate and detailed calendars people used. The Tzolkin calendar was ...

Here are 9 tips to make post-apocalypse life a little easier. Whether you’re a Doomsday believer or think the Mayan's calendar maker just ran out of steam, there’s no denying being prepared ...