Asteroid impacts and life on Mars.




“By recreating the violent shock of an asteroid impact, scientists found that a famously resilient bacterium can survive the crushing forces that could launch it off Mars. The discovery strengthens the idea that life might hitchhike between planets after major cosmic collisions. Credit: SciTechDaily.com” (ScitechDaily, Asteroid Impacts Could Launch Living Microbes From Mars)

If an asteroid impact were to launch living microbes from Mars, we could ask another interesting question. Could life be born on Mars? Or did some other asteroid bring those organisms' ancestors to the Red Planet? Another thing is also interesting. If the meteorite Alan Hills, ALH84001, involves remnants of ancient microbes. Could those microbe remnants come from Mars? There is also a possibility. The temperature of that meteorite. Which fell to Antarctica, acted as a call signal for some bacteria that might not be anywhere else than in the Antarctic ice. This is the reason why researchers should collect samples from Asteroids like Ceres. If there are similar bacteria on Ceres, Mars, and Earth, that means those very primitive bacteria could have the same origin. The fact is this. Nobody can be sure. 

That some remnants are bacteria before the DNA tests. And it’s possible that the UV-radiation destroyed all the DNA from bacteria that could live on Mars. The problem with ALH804001 is that the asteroid dropped to Earth. That means Earth microbes. Turn that sample dirty. Travel through the atmosphere and radiation on the journey to Earth would destroy all DNA. But. Maybe there are some bacterial remnants. There is DNA or RNA left in Mars’ polar areas. 





“Microscopic image of Martian meteorite ALH84001. This microscopic image of Martian meteorite ALH84001 shows an elongated structure that resembles a fossil microorganism. NASA” ( The Planetary Society, Microscopic image of Martian meteorite ALH84001)

And maybe, if the meteorite shower threw stones with those bacteria into space, some of them could fall onto some asteroids. And it’s possible that there could be some DNA or RNA left in those remnants. That could be found in the asteroid belt. Cosmic radiation is the thing that destroys those molecules very effectively. In the same way. Heat can destroy them. The DNA or RNA could help. To recognize some structures. As bacterial remnants. 

The microbes on Mars could have vanished because Mars lost its lithosphere in a cosmic catastrophe. This catastrophe could push that planet.  To the trajectory, where it is now. This meteorite impact. It could also push the Martian atmosphere into space. That impact destroyed the life that could have been in a very primitive stage. But is this mode true? Maybe some probes will find out. 

In some models. Life itself could be a very common thing in the universe. But that means primitive lifeforms. The complicated lifeforms. And especially an intelligent lifeform. It can be even rarer than people thought. So primitive prokaryotes could exist in many solar systems. But there could be only a couple of intelligent civilizations in the entire galaxy. So, those “martians” could be the very primitive microbes rather than some insects.


https://www.planetary.org/space-images/microscopic-image-of-martian-meteorite-alh84001


https://scitechdaily.com/asteroid-impacts-could-launch-living-microbes-from-mars/


https://scitechdaily.com/scientists-discover-evidence-of-methane-in-martian-meteorites/


https://scitechdaily.com/stanford-promising-signs-for-past-martian-life-at-jezero-crater-mars/


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