Human Journey

The Kilogram’s New Diet Plan

 

Environmental contamination, and not the holiday season, has caused the International Prototype Kilogram to put on some extra pounds over the decades. Scientists are now looking for a safe and reliable method of cleaning the cylinder so that its mass remains stable and equal to that of several dozen copies around the world.

About the Blog

Researchers, conservationists, and others share stories, insights and ideas about Our Changing Planet, Wildlife & Wild Spaces, and The Human Journey. More than 50,000 comments have been added to 10,000 posts. Explore the list alongside to dive deeper into some of the most popular categories of the National Geographic Society’s conversation platform Voices.

Opinions are those of the blogger and/or the blogger’s organization, and not necessarily those of the National Geographic Society. Posters of blogs and comments are required to observe National Geographic’s community rules and other terms of service.

Voices director: David Braun (dbraun@ngs.org)

Social Media