The Breakthrough Initiatives project is funding a pivotal study to investigate the discovery of phosphine in Venus' atmosphere. Leading astrobiologist Sara Seager from MIT heads the expert team.
On September 14, the Royal Astronomical Society announced a compelling finding: astronomers detected phosphine in Venus' clouds at altitudes mimicking Earth's sea-level conditions in temperature and pressure. This is noteworthy because, on Earth, phosphine is primarily produced by anaerobic bacteria—though it can also be lab-synthesized for pest control.
Detecting phosphine's spectral signature on Venus doesn't confirm extraterrestrial life. Venusian microbes might produce it, but exotic, non-biological chemical reactions could explain it too.
This breakthrough warrants deeper scrutiny. Breakthrough Initiatives, a leading program searching for extraterrestrial intelligence, is funding a study to explore the finding and its implications.
MIT planetary scientist Sara Seager, a key member of the original phosphine detection team, leads the effort. Her collaborators include Janusz Petkowski (MIT), Chris Carr (Georgia Institute of Technology), Bethany Ehlmann (California Institute of Technology), David Grinspoon (Planetary Science Institute), and Pete Klupar (chief engineer, Breakthrough Initiatives).
“We are excited to push the boundaries to try to understand what kind of life might exist in Venus’ very harsh atmosphere,” said Pete Worden, executive director of the nonprofit.
“Finding life anywhere beyond Earth would be truly memorable,” noted billionaire Yuri Milner, primary funder of Breakthrough Initiatives. “And while there is a non-negligible chance that it is right next to Venus, exploring this possibility is an urgent priority for our civilization.” The press release did not disclose the study's budget or timeline.
Claims of "the greatest scientific discovery in history" require rigorous validation, as Carl Sagan aptly stated: "extraordinary claims require extraordinary evidence."
Confirming a biosignature on Venus demands comprehensive understanding of its atmospheric chemistry, ruling out non-biological sources, and verifying phosphine's biological origin. Only then can we pursue detailed life studies.
Earth-like microbes seem improbable in Venus' atmosphere, detected at habitable altitudes but amid sulfuric acid clouds. This corrosive milieu would destroy them "unless they were surrounded by some sort of protective shell," Seager notes.
Any Venusian life, if present, may not resemble Earth's and could thrive without water.
