As NASA's Mars InSight mission comes to an end, JPL engineers say farewell to its twin
Briefly

Pranay Mishra reached down to the floor of his workplace and scooped a handful of what might be the closest thing on Earth to the feel of Martian soil."This is actually unprocessed garnet," he said, sifting the gray granules in his palm.Tiny ruby-colored flecks caught the light.Mixed with diatomaceous earth, a fine powder of algae fossils often used by gardeners, the coarse gray stuff makes a decent substitute for the density and texture of Mars' dirt.
Read at Los Angeles Times
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