Metric_system.png (PNG Image, 1427x628 pixels) - Scaled (70%)

A little over two hundred years ago, the SI (International System) of units came into being. Although a bit abused (mainly in the US, where it is often referred to as the "metric" system), it has taken over the world. Well, almost all of it. The figure shows the countries that have not adopted it. Good geography practice too!

Metric_system.png (PNG Image, 1427x628 pixels) - Scaled (70%)