Mars, the Red Planet, may have been much wetter in the distant past than scientists ever imagined. A groundbreaking discovery ...

Researchers examining Noachis Terra in Mars' southern highlands found evidence of extensive river networks – some hundreds of kilometers long.

After its voyage past Mars, Mariner 4 maintained intermittent communication with JPL and returned data about the ...

Mariner 4, built by JPL in Pasadena, took the images on July 14, 1965. One of the mission's leaders reflects on decades of ...