The nixie tube is one of the oldest and retro-futuristic of digital display technologies: a glass tube (similar in appearance to a vacuum tube) containing a wire-mesh anode and multiple cathodes that, when powered, become glowing orange numbers. Artist Peter Jensen buys up old, space-race Soviet era Nixie-tubes and turns them into fantastically retro-futuristic digital clocks. A four digit Nixie Tube clock kit will cost you $135, or only $99 if you don't mind tearing apart crazy ol' grampa's non-functioning time machine for the stray parts, but you can go up to a six-digit aluminum model for $495. Gorgeous. These look like they were just removed from the dash panel of Flash Gordon's 1950s-era rocket ship. I want one.