Uses animation to highlight reasons for the United States upcoming metric conversion. Introduces the meter, liter, kilogram and celsius. Emphasizes prefixes and stresses the decimal nature of the metric system. Points out the benefits of conversion.
For the majority of recorded human history, units like the weight of a grain or the length of a hand weren’t exact and varied from place to place. Now, consistent measurements are such an integral part of our daily lives that it’s hard to appreciate what a major accomplishment for humanity they’ve been. Matt Anticole traces the wild history of the metric system.
It's tough to know what happened on Earth thousands of years before anyone started writing anything down. But thanks to the amazing work of anthropologists and paleontologists like those working on National Geographic's Genographic Project, we can begin to piece together the story of our ancestors. Here's how early humans spread from East Africa all around the world.