A new study reconsiders the controversial findings of NASA's Viking Mars lander in 1976, which some argue may have shown signs of past life on the Red Planet.

In the 1970s, the Viking mission to Mars provided information about the geology and weather on the red planet. The primary mission of the two robot space crafts was to determine if there was life ...

this time from space: National Geographic fellow Sarah Parcak, an expert in detecting buried structures from satellite images, has identified another likely Viking site on the southernmost tip of ...

plus money-saving tips with our free twice-daily newsletter The twin Viking space probes were launched in 1975. They provided scientists with the first ever high-resolution photos of Mars ...