Searching for human bodies or other submerged items can be dangerous for divers due to factors such as strong currents, deep waters and low visibility. That's where the Tethys One underwater drone ...

Tethys, one of Saturn’s larger icy moons, vaguely resembles an eyeball staring off into space in this view from NASA’s Cassini spacecraft. The resemblance is due to the enormous crater, Odysseus, and ...

Like graffiti sprayed by an unknown artist, unexplained arc-shaped, reddish streaks are visible on the surface of Saturn’s icy moon Tethys in new enhanced-color images from NASA’s Cassini spacecraft.

Three of Saturn’s moons — Tethys, Enceladus and Mimas — are captured in this group photo from NASA’s Cassini spacecraft. Tethys (660 miles or 1,062 kilometers across) appears above the rings, while ...