Um, What’s That Bright, Shiny Thing Curiosity Just Found on Mars? The Atlantic

A close-up of the small pit created when the Curiosity rover collected its second scoop of Martian soil. The bright particle near the center — which resembled similar ones elsewhere in the pit — were determined to be native Martian material rather than, as was first thought, spacecraft debris. Curiosity’s on-board analytic instruments will use X-rays to determine the composition of the mystery material.