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"Okay, so we could pretty much figure out that JVC's breath sphere speaker wasn't exactly the roundest thing we'd ever seen, but we can't say we've really ever given much thought to how round / not round a round object really is. Thankfully, the scientists involved in the Avogadro Project do give it some thought, and they're toiling away as we speak in an attempt to create almost useless silicon balls which serve one simple purpose: to \"redefine the kilogram in terms of magnetic fields and electrical forces.\" What does weight have to do with this? Currently, the kilogram is the \"only remaining standard of measurement tied to a single physical object: a 120-year-old lump of platinum and iridium that sits in a vault outside of Paris, France.\" Trivial? A bit -- but don't tell that to the guys that weigh gold bars."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.engadget.com/2008/07/02/scientists-create-roundest-objects-in-the-world/>