Weights and Standards... and Math

Lots of interesting math happening lately but it's getting covered well by other blogs/sites so I'll opt for something different today… this 12-min. video from the always interesting "Veritasium" that crosses the bounds of physics, chemistry, and math. It deals with measurement, and the roundest object in the world (and the difficulty of standardization); gets especially interesting from about the 4-min. mark on (but watch from the beginning):