Back in 2009, scientists detected an odd-shaped rock by the Mars Exploration Rover Opportunity’s panorama camera. NASA’s Jet Propulsion Lab (JPL) team spotted the rock, now called Block Island, in the images downlinked to Earth after it had driven past the rock. The rover backtracked some 820 feet to study Block Island closer, eventually touching the rock with its robotic arm. The image showed a rock approximately 2 feet in length and half that in height, with a metallic bluish tint that distinguished it from other rocks in the area. Upon further analysis scientists discovered that Block Island was a meteorite comprised of iron and nickel. A portion of Block Island’s surface indicated exposure when a meteorite is abraded, polished, and etched by windblown sand.