The most significant change since those 1970's experiments were conducted was the discovery of high levels of perchlorate on Mars. Perchlorate, plus abiotic oxidants, explains the Viking results and ...

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 ...

In a communiqué with Christopher McKay, he told Space.com: "It is important to note that we are not saying that the Viking results imply 'no life on Mars.' Nor are we saying the Viking results ...