And NASA's two Viking landers in 1976, equipped with sophisticated life chemistry experiments, analyzed the soil and found it devoid of the organic building blocks of life.

并且美国宇航局的两个维京人登陆车在1976年，装备有精密的生命化学实验仪器，分析了它的土壤发现完全不存在可以构成生命的有机组织结构。

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They could see a test version of the Viking landers that reached Mars in July of nineteen seventy-six.

VOA: special.2010.07.28

Previous missions, notably the Viking landers in the 1970s, have hinted at the presence of organics on Mars.

BBC: Gale Crater: Geological 'sweet shop' awaits Mars rover

The Viking landers took over 7, 000 images of the surface of Mars.

NPR: Revisiting the Viking Missions to Mars

After the Viking landers failed to find life on Mars in 1976, the scientific consensus was one of skepticism that bordered on ridicule.

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