PBS America | The Last Artifact | Full Special
The Last Artifact follows the high-stakes race to redefine the world's base unit to measure weight and reveals the untold story of one of the most important objects on the planet.
2025-01-05 11:00:00 - PBS America
The kilogram was the last of the SI units still defined by a physical artifact - a man-made cylinder located in Paris. Over time, its mass mysteriously eroded, and unleashed a crisis with potentially dire consequences.