First signs of boron on Mars hint at past groundwater, habitability
ELEMENTAL DISCOVERY Veins of calcium sulfate sampled by the Curiosity rover near the base of Mount Sharp in Gale Crater contain boron, the first time the element has been detected on Mars. Orange bars show the relative abundance of boron at sites along one vein (red markers) tested by Curiosity’s chemical-identifying laser.
William Rapin/CNES-IRAP, LANL, MSSS, JPL-Caltech