Billions of years of exposure to the sun, atmosphere and extremely fine Martian dust has given Mars rocks a weathered “rind,” or exterior layer. The RAT, part of the science-instrument package carried ...
PASADENA, Calif. -- Facelifts can sag. Botox is temporary. But modern science has a new way to return youth to weathered faces: the rock abrasion tool (RAT). If your dermatologist hasn't heard of it, ...
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