How life may find a way on Saturn's moon
By Ashley Strickland, CNN
Updated 0004 GMT (0804 HKT) July 29, 2017
Photos: Saturn and its moons
Tethys is one of Saturn's larger icy moons. This photo was snapped by NASA's Cassini spacecraft in November 2016 from a distance of approximately 228,000 miles (367,000 kilometers).