Top Mysteries: NASA’s New Horizons Captures 'Space Snails' On The Surface of Pluto Posted by 0x000216 April 15, 2017 NASA's New Horizons captured a strange sighton the surface of Pluto: Figures that looked like snails and apparent trailsbehind them. Since life is unlikely to exist in such a hostile environment, what exactly is going on in this intriguing photo?