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In 2020, the astronomy world was roused at the prospect of phosphine, a gas associated with anaerobic bacteria, after it was seemingly detected in the Venusian atmosphere.

In 2020 researchers publishing in the journal Nature Astronomy revealed that the atmosphere of Venus appeared to contain trace amounts of phosphine, a gas associated with anaerobic bacteria on Earth.

The substance reacted with moisture, creating the poisonous gas phosphine, which has been likened to a chemical warfare agent.

The most plausible is phosphine gas, created from the fermentation of plant matter inside the soil’s low-oxygen environment.

If phosphine is the first step to discovering life on Venus, it's going to be a long time before we do, Wright said, including starting and completing many of the planned missions to Venus.