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At a busy airport, every aircraft in the area shares just a handful of radio frequencies. Spectrum and time are constrained and if multiple people speak at once, both messages can get lost....

NASA’s Perseverance rover recently took a self-portrait against a sweeping backdrop of ancient Martian terrain at a location the science team calls “Lac de Charmes.” Assembled from 61 indivi...

NASA’s Perseverance Mars rover recently took a self-portrait against a sweeping backdrop of ancient Martian terrain at a location the science team calls “Lac de Charmes.” Assembled from 61 i...