This image of three Martian Rover tires - the Sojourner, the Spirit/Opportunity, and Curiosity respectively - is fascinating in and of itself. However, Jed manages to crank it up another notch in terms of Fascination Levels by pointing out that the far right tire actually has Morse code for "JPL" built right into it. You know, NASA's Jet Propulsion Laboratory ?

If you haven't seen a photo of the Curiosity Rover yet - do yourself a favor and check it out. It looks exactly like everything you ever made with Construx (or maybe I'm dating myself).