Plain language summary:<p>> We re‐examined archived data obtained by the Pioneer Venus Large Probe Neutral Mass Spectrometer. Our results reveal the presence of several minor chemical species in Venus’ clouds including phosphine, hydrogen sulfide, nitrous acid (nitrite), nitric acid (nitrate), hydrogen cyanide, and possibly ammonia. The presence of these chemicals suggest that Venus’ clouds are not at equilibrium; thereby, illuminating the potential for chemistries yet to be discovered. Further, when considering the potential habitability of Venus’ clouds, our work reveals a potential signature of anaerobic phosphorus metabolism (phosphine), along with key chemical contributors towards anoxygenic photosynthesis (nitrite) and the terrestrial nitrogen cycle (nitrate, nitrite, possibly ammonia, and N2).<p>Twitter thread from Shannon Stirone with a bit more info: <a href="https://twitter.com/shannonmstirone/status/1374512206335766530" rel="nofollow">https://twitter.com/shannonmstirone/status/13745122063357665...</a>