This was reblogged on Rhizome.org in '06 but Google seems to have lost it. A little digging and I found the permalink: Time Lapse Molecule 2. (Re-reblog.)
Update, January 2011: Rhizome keeps revamping its system of archiving reblog posts. The post where this appeared has changed permalinks a couple of times. It can currently be found here but the originating URL is gone so it appears to be a piece of artwork by the reblogger Marisa Olson. All posts that were originally reblog posts are now archived as "editorial" and tagged "reblog archive."