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The Soviet Union's "Luna 16" and "Luna 20" spacecrafts has found Microorganisms into Moon regolith in 1970.
On 24 September 1970, for the first time, an unmanned spacecraft delivered a lunar "soil" sample to Earth. The Soviet Union's Luna 16 spacecraft returned from the moon's Sea of Fertility with 101 grams of lunar regolith in a hermetically sealed container.
In February 1972, only 120 kilometers from the Luna 16 site, Luna 20 used a drill with a ten-inch, hollow-core bit to collect another regolith sample that was also hermetically sealed on the moon. Back in the USSR, the sealed containers from the Luna missions would be promptly delivered to the laboratory for the contents to be examined and photographed. But even after hundreds of the pictures were published in an atlas in 1979, the biological nature of some of the particles was not noticed.
Further study of the photographs was later undertaken by two biologists at the Russian Academy of Sciences, Stanislav I. Zhmur, Institute of the Lithosphere of Marginal Seas, and Lyudmila M. Gerasimenko, Institute of Biology. They noticed that a few of the particles in the photographs were virtually identical to fossils of known biological species. Specifically, some spherical particles from the Luna 20 regolith plainly resemble fossils of modern coccoidal bacteria like Siderococcus or Sulfolobus in their scale, distribution, form, and the distortion of the spheres that occurs during fossilization......
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