Searching for life on Venus and Mars.

“A closeup of "leopard spots" on Mars seen by the Perseverance rover. (Image credit: NASA/JPL-Caltech/MSSS)(Space.com)

50 years old data. Tells that 60% of Venus aerosols are water. So, most of the Venus clouds are water, and that brings new boos for searching for some kind of life in the Venus cloud area. Life in the form as we know it is not possible on that planet’s surface. But it's possible that microbes that can isolate oxygen from water using electrochemical electrolysis can hover in Venus’ dense atmosphere. The oxygen blister in the bacteria's body can make them hover in those clouds. And maybe they get nutrients from minerals trapped in those aerosols. This is one way to think. About the alien lifeforms. Which could be some primitive bacteria. But there is no straight evidence about lifterorms. As we know, there is no direct evidence about life on Venus or on Mars. There is some kind of evidence of phosphine in Venus’s atmosphere. There are also interesting rocky remnants on planet Mars. But there is no evidence of the DNA or RNA. That could connect those remnants to lifeforms. 

There are things. Like meteorites that have been collected from Antarctica. Those meteorites include structures. That looks like bacterial fossils. And the most well-known of those meteorites is Allan Hills 84001 (ALH84001). The microscopic images of the surface show that the meteorite involves interesting structures. But the problem is that ALH84001 is polluted. Those structures might come from Earth. And the problem is, even those bacteria-shaped structures might involve some DNA or RNA. But there are no samples. Taken from Mars. And remain sterile. This means researchers have no sterile sample from Mars that they can compile with ALH84001. 

(Science alert)

More details

Electron microscopy revealed chain structures resembling living organisms in meteorite fragment ALH84001 (Wikipedia)

So they cannot prove that. The possible genetic material. That they could find from ALH84001 is from Mars. On this day, there is no direct evidence of ancient life on Mars and Venus. The problem is that the UV-radiation would destroy the genetic material of those, still hypothetical, bacteria. Those fossil remnants could still be on Mars. There is evidence of an ocean that covered the entire northern hemisphere on Mars. The UV radiation and possible meteorite impacts destroyed that ocean. But it’s possible that Mars was once a harbour for life. Then, some cosmic impact threw it into a trajectory that is near the asteroid belt. In this hypothesis, the planet Mars was closer to the Sun before it collided with a protoplanet. That impact pushed it into a position.

 Where it's today. And if that hypothesis is true, there could be some kind of prokaryotes. Primitive bacteria. That could look like cyanobacteria on Earth. Locating the lifeforms on Venus is also very difficult, even if those lifeforms could be active. Venus’s atmosphere is mainly carbon dioxide and carbon monoxide. If those hypothetical bacteria deliver carbon dioxide in their metabolic products, that carbon dioxide will be very hard to separate from the chemical background. This means that the search for lifeforms. Or their remnants on Mars and Venus will continue. Verifying those hypothetical lifeforms requires samples from those planets. Before those samples arrive at laboratories, everything is open. So on this day. There is no direct evidence of the lifeforms on other planets. There are suspicions. But there is a need for more evidence. That those researchers could confirm the existence, or non-existence, of those hypothetical lifeforms. 

https://www.sciencealert.com/50-year-old-data-reveals-venuss-clouds-are-mostly-water

https://www.space.com/astronomy/mars/the-metal-detector-has-gone-off-perseverance-rovers-find-is-a-shiny-new-clue-in-the-search-for-life-on-mars

Https://scitechdaily.com/nasa-perseverance-rovers-stunning-find-may-be-mars-first-sign-of-life/

https://phys.org/news/2025-09-mars-perseverance-rover-presence-microbial.html

https://consent.yahoo.com/v2/collectConsent?sessionId=3_cc-session_9574ef1f-45f5-41fc-bb98-dfee7c80d28a

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