"Russian space enthusiasts poring through photos from NASA's Mars Reconnaissance Orbiter have spotted what looks like the remains of the Soviet Mars 3 lander that arrived at the Red Planet in 1971.
The Soviet Union lander was the first spacecraft to survive a Mars landing long enough to transmit data back to Earth. However, after transmitting for just 14.5 seconds after landing on Dec. 2, 1971, Mars 3 went dark for unknown reasons."

[link to news.yahoo.com]