# Tweet by [@keefmoon](http://twitter.com/keefmoon) on 2012-07-07 07:16:45 > [!INFO] Archived from [original tweet](http://twitter.com/keefmoon/status/221503001066614785) RT @TechZader: The Not-So-Perfect Kilogram and Why the Metric System Might Be Screwed http://t.co/CHdKA3LX