The wheels of the Mars Curiosity rover have square hole cutouts that leave a pattern of tracks in the dirt. Along with rear-facing cameras, these "visual odometry markers" are used to monitor the rover's progress and tell if it's stuck.

A sharp-eyed space reporter noticed that the patterns are Morse code, and here's what they spell out:

. - - - (J)
. - - . (P)
. - . . (L)


Chattanooga bicycle company tasked with making Curiosity's legs. (By way of RoaneViews)

U.T. researchers design microchips for Curiosity rover

U.T. professors in hunt for life on Mars


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To date, the failure to expand Medicaid/TennCare has cost the State of Tennessee ? in lost federal funding. (Source)

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