It is an object unlike any other, the last of its kind. A literal constant in an ever-changing world, and the weight by which all others are measured. The Last Artifact follows the high-stakes race to redefine the weight of the world, and reveals the untold story of one of the most important objects on the planet: the kilogram. Learn about why the kilogram is called “The Last Artifact” and why it is so important to the world of science.