Astronomers spot possible signs of microbial life on Venus's clouds

As per National Geographic, phosphine can only be found in rocky planets like Earth and Venus. Also, it can only be made by life - human or microbe. It can be manufactured as well. Interestingly, it was used as a chemical weapon in World War 1.

A team of researchers first used the James Clerk Maxwell Telescope (JCMT) in Hawaii (in pic) to detect the phosphine. They were then awarded time to follow up their discovery with 45 telescopes of the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile. Both facilities observed Venus at a wavelength of about 1 millimetre, much longer than the human eye can see -- only telescopes at high altitude can detect this wavelength effectively.

Researchers have speculated for decades that high clouds on Venus could offer a home for microbes -- floating free of the scorching surface, but still needing to tolerate very high acidity. The detection of phosphine molecules, which consist of hydrogen and phosphorus, could point to this extra-terrestrial 'aerial' life, according to the research published in the journal in Nature Astronomy.

Venus, which is about the same size as Earth, was earlier expected to offer a second home for humans in the solar system. However, early science observations put cold water on those hopes. With a surface blazing at 900 degrees Fahrenheit and with clouds of sulfuric acid, Venus is literally a hellhole.