# Why the Metric System Is So Important

Myanmar, Liberia, and the United States of America. Those are the only three countries left in the world that don’t use the metric system. Ted-Ed traces the history of the metric system (thank you French Revolution) to show how important it is to have one universal measurement system for the world, what can happen…

# Pokémon Go Is Secretly Teaching Americans the Metric System

How many kilometers are in a mile?

# 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.…

# The World's Official Kilogram Is Losing Weight and That Might Screw the Metric System

We've long known that there were some issues with France's 'Le Grand K', the international prototype for what a kilogram really is. Made in 1879 from platinum and iridium alloy, it is the perfect standard for what a kilogram weighs. The problem is, it's losing weight.

# The Short, Strange History of Decimal Time

For thousands of years, we've divided days into 24 hours, hours into 60 minutes, and minutes into 60 seconds. But why do we have to do that? Here's the story of the one gloriously failed attempt to decimalize time.

# After decades of scientific research, we can now accurately measure a kilogram

Measuring systems are almost always arbitrary - even the orderly metric system is chopped up into random little pieces we call grams, kilograms, and tons. With the increased need for precision, it's necessary that everyone use the same random unit of mass for a kilogram. After a Nobel winning discovery, and decades of…

# 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