The most famous and weird wall calendars in history: An interactive map of the world’s most famous wall calendars

The wall calendar is a popular symbol of the United States, but it has become a source of confusion in recent years.Is the American flag, for example, a wall calendar, or does it look like a calendar?A team of researchers has developed a map that shows the most iconic wall calendars from around the world.It's not all that different from Google Maps, which shows the world by way of its own...