NASA's Viking 2 was a joint orbiter-lander mission that saw the second U.S. landing on Mars on Sept. 3, 1976. Viking 2's lander touched the Red Planet just weeks after its sibling, Viking 1. The ...

Forty years ago today (July 20), NASA's Viking 1 Mars lander became the first American spacecraft to touch down safely on the Red Planet.

The Viking 2 lander is still visible on the surface of Mars -- a souvenir of a program that NASA says cost approximately $1 billion. There were disappointments, of course.

NASA’s Viking program sent two identical probes, Viking 1 and Viking 2, to Mars. Both of these consisted of an orbiter to take photographs of the planet, and a lander to conduct experiments on ...

Viking 1 launched 48 years ago this week and made history when it became the first spacecraft to land safely on Mars' surface and send images back to Earth.

Life on Mars may have been found — before it was accidentally destroyed during a NASA mission nearly 50 years ago, one scientist has suggested.

Dirk Schulze-Makuch is a scientist who thinks NASA's Viking landers could have inadvertently destroyed the life they were searching for. In this Q&A, we ask why.

NASA’s Viking 2 lander probably discovered quakes on Mars almost 50 years ago, but this has only just been confirmed thanks to data from the more recent InSight probe. In 1975, NASA launched two ...

Viking 2 was launched on September 9, 1975, less than a month after Viking 1, which landed on Mars on July 20, 1976. The Viking spacecrafts consisted of an orbiter and a lander, which separated after ...

NASA’s Viking program sent two identical probes, Viking 1 and Viking 2, to Mars. Both of these consisted of an orbiter to take photographs of the planet, and a lander to conduct experiments on ...

Life on Mars may have been found — before it was accidentally destroyed during a NASA mission nearly 50 years ago, one scientist has suggested. In 1975, just six years after Apollo 11 touched ...