Three horizontal cracks, a pale orange stripe, and a cratered white surface. Bright blue marks inside each fissure contrast with the orange stripe of paint. The cracks and stripes form an artful composition, but this is not a work of abstract art. It’s a false color image of volcanic faults on the surface of Mars — places where the planet’s crust has been pulled apart. Scientists suspect the formation of these cracks, or fossae, may have once released pressurized underground water.