NASA has identified what appears to be a huge river system on Saturn’s moon Titan, after the spacecraft Cassini performed a close flyby and snapped photos of what’s believed to be a 200 mile long, liquid-filled trench. The river valley, compared to Earth’s Nile River by NASA by virtue of its sheer scale, is the largest ever to have been observed other than on our planet, though it’s not filled with water. Instead, the Titan river is believed to be made up of the liquid hydrocarbons that give the moon its unusual precipitation.
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