organic+viking

"...if the Viking scientists had known these results thirty years ago, they would have interpreted Viking’s work differently [...] we can’t discount organic molecules in the soil, which probably

test space organic life results mars soil lander martian viking molecules discredited

"Researchers now say that the landers’ experiments were not sensitive enough to find life and in any case may not have been able to spot the strange forms that Martian life might take."

space organic life tests mars soil martian viking landers molecules reassessment