On Monday scientists reported in an investigation the existence of a substance in the atmosphere of Venus that could come from some kind of life. This is strong evidence that some form of microscopic life could inhabit our neighboring planet, something that has caught the attention of the scientific community around the world. And out of nowhere we learn that Carl Sagan, a few years before we first reached the moon, had already had the idea that Venus could harbor life.

In a 1967 research published in Nature, Carl Sagan explored the crazy theory that the atmosphere of Venus could contain some kind of living microorganism inside it.

“The planet Venus is covered with clouds that prevent telescopic examination of its surface. In the absence of direct observations, reasons are adduced for proposing a number of different and mutually consistent surface conditions, ”Sagan wrote.

It is clear that the surface of the planet, with its 450 degrees Celsius, was a doubtful candidate to contain life. But the story is different in the Venusian sky, Sagan believed.

“Conditions are much more favorable at higher altitudes, especially just below the clouds, and there is the possibility of a biological presence in the upper atmosphere of Cytherean. At such high temperatures and in the absence of liquid water, it seems highly unlikely that indigenous organisms exist today. ”

The astrophysicist also considered the possibility that, although life existed on the surface of Venus millions of years ago, it could have moved into the atmosphere and other less hostile environments.

“If life based on the chemistry of carbon-hydrogen-oxygen-nitrogen ever developed in the early history of Venus, it must have subsequently evolved to underground or atmospheric ecological niches.”

Scientists reported the existence of phosphite in the atmosphere of Venus. This substance is found in environments where anaerobic microorganisms inhabit.