Jim, K1KJW, and others alerted me to this very cool move by the inventive minds at JPL. They put a Morse Code pattern in the tire treads of the Curiosity rover. So now as it drives around, it spells out JPL in the Martian regolith.
http://www.nasa.gov/mission_pages/msl/news/msl20120829f.html
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Preview of the Spring 2024 edition of SPRAT Magazine
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*Thanks to the paid subscribers to the new EI7GL newsletter on Substack,
I've used the funds to subscribe to a few amateur radio related
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