An Arizona highway has used the metric system since the 80s

Who doesn't like a math pop quiz when driving down to the Mexican border? If you turn onto Interstate 19, which runs 63 miles (101 kilometers) from Tucson, Arizona, down to Mexico, the road signs suddenly change to metric units. Interstate 19 is a relic from a more optimistic era, when we believed all of the U.S.… » 10/07/14 5:38pm 10/07/14 5:38pm

These Are the Three Countries Who Don't Use the Metric System

As a reminder, these are the three countries who don't use the incredibly sensible metric system: Liberia, Myanmar and of course, the United States of America. U-S-A! U-S-A! Hell, we should all form some sort of alliance! Non US-people, feel free to tell us why we're dumb for not using the metric system. [Wikimedia » 3/26/11 11:00am 3/26/11 11:00am