"NASA’s Perseverance rover, a six-wheeled geologist, found a fascinating rock that has some indications it may have hosted microbial life billions of years ago, but further research is needed. Credit: NASA/JPL-Caltech" (ScitechDaily, Astonishing Evidence of Life Discovered on Mars by NASA’s Perseverance Rover)
In first another interesting thing is that InSight lander could form liquid water on planet Mars. That thing is one of the most interesting findings on the red planet. That liquid water is not confirmed.
"NASA’s Perseverance rover discovered “leopard spots” on a reddish rock nicknamed “Cheyava Falls” in Mars’ Jezero Crater in July 2024. Scientists think the spots may indicate that, billions of years ago, the chemical reactions in this rock could have supported microbial life; other explanations are being considered. Credit: NASA/JPL-Caltech/MSSS" (ScitechDaily, Astonishing Evidence of Life Discovered on Mars by NASA’s Perseverance Rover)
The Perseverance rover made one of the most interesting and astonishing evidence of ancient life on Mars. That rover found a couple of rocks that involved structures that seemed like cyanobacteria remnants. Those structures are unique. That makes them interesting, even if they are not some remnants of procaryotic organisms. The origin of those structures as bacteria is not confirmed. But suspicions are strong.
Today, Mars is a cold and hostile planet. But in the past, there have been oceans on its surface. Those oceans flew to space when asteroid impacts destroyed the red planet's surface. And maybe those impacts pushed Mars out of its trajectory and away from the habitable zone. The asteroid impacts threw lots of Mars's atmosphere into space. And that thing caused Mars's atmosphere to be very thin.
"A cutout of the Martian interior beneath NASA’s Insight lander. The top 5 kilometers of the crust appear to be dry, but a new study provides evidence for a zone of fractured rock 11.5-20 km below the surface that is full of liquid water — more than the volume proposed to have filled hypothesized ancient Martian oceans. Credit: James Tuttle Keane and Aaron Rodriquez, courtesy of Scripps Institute of Oceanography, edited" (ScitechDaily, Did We Just Find Liquid Water on Mars? NASA InSight Lander’s Surprising Data)
But when we think about the rocks that Perseverance studied, those details are interesting. If those rocks are unique and there is no other place where similar structures are, that makes those rocks even more interesting. If we someday find evidence of the ancient lifeforms on the red planet and those remnants are only in one place, that tells that they came from somewhere else.
That "somewhere else" could be the probe, which was not disinfected properly. But where is that probe? Another possibility is that the stone came from another planet like Earth. The meteorite that killed dinosaurs could throw stones into space, and even to planet Mars.
"An annotated version of the image of “Cheyava Falls” indicates the markings akin to leopard spots, which have particularly captivated scientists, and the olivine in the rock. The image was captured by the WATSON instrument on NASA’s Perseverance Mars rover on July 18. Credit: NASA/JPL-Caltech/MSSS" (ScitechDaily, Astonishing Evidence of Life Discovered on Mars by NASA’s Perseverance Rover)
"As shown in this graphic, astrobiologists catalog a seven-step scale, called the CoLD (Confidence of Life Detection) scale, to research whether a sample could indicate life. This “Cheyava Falls” sample is an example of Step One: “Detect possible signal.” Much additional research must be conducted to learn more. Credit: NASA/Aaron Gronstal" (ScitechDaily, Astonishing Evidence of Life Discovered on Mars by NASA’s Perseverance Rover)
But there is a theory about the ancient planet that orbited the sun somewhere in the asteroid belt. Then some protoplanet, that was larger than almost hypothetical Theia, impacted Earth and formed the Moon impacted that planet and turned it into an asteroid cloud. Then the solar wind blew those asteroids into the asteroid belt. The fact is this. In the young solar system, collisions were quite a common thing.
And even if those things are not bacteria remnants, they are still fascinating. The other thing is that we may not find real evidence like living bacteria on Mars. Some fossils of those bacteria can be found on that planet. And if those fossils are only in one place, this makes this thing more interesting. It tells that bacteria is from somewhere else.
And the RNA or DNA remnants tell more about those bacteria. If they existed. But the sunlight can destroy DNA and RNA very fast.
https://scitechdaily.com/astonishing-evidence-of-life-discovered-on-mars-by-nasas-perseverance-rover/
https://scitechdaily.com/did-we-just-find-liquid-water-on-mars-nasa-insight-landers-surprising-data/
https://en.wikipedia.org/wiki/Prokaryote
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