In one study, scientists called bacteria It is possible to live beneath the surface of Mars much longer than previously thought. Even up to 280 million years.
This is an opportunity for scientists to find evidence that the red planet once harbored life New scientist Wednesday (10/26/2022).
Previous experiments to test the resistance of microorganisms to intense radiation on Mars have used bacteria that are hydrated at room temperature. It is estimated that this microorganism survives “only” one million years at most.
Recent experiments using dry bacteria and yeast
Another case with the latest experiments conducted by Brian Hoffman of Northwestern University in Illinois, United States with his colleagues. They used a different method by drying various bacteria and yeasts and freezing them before being exposed to radiation on Mars, then measuring the damage.
“There is a phenomenal doubling of resistance when the water is drained and cooled,” explains Hoffman.
Upon examination, the researchers found that the samples were only slightly damaged by the radiation, so they estimated it bacteria it can survive in the dry and cold environment of the surface of Mars for up to 280 million years.
When frozen and dried bacteria are exposed to water for any length of time, the researchers say the microorganisms will reactivate from their dormant state.
The possibility of finding microorganisms in living conditions is also increasing, according to the researchers, but it is still not exceptional.
Mars is estimated to have dried up 3 billion years ago
The planet Mars is thought to have dried up about 3 billion years ago, so all the bacteria are probably dead by now too.
The longevity of the bacteria, on the other hand, could make it easier for scientists to find evidence of life that once lived on Mars. However, when space explorers arrive there, it could potentially contaminate the bacteria with organisms brought from Earth.
If we pollute the area where we land, how will we know and know which one bacteria from Mars with what we brought from Earth. This can make it difficult to determine if there really is life on Mars or not, ”Hoffman said.
Watch videos”Mars exploration leads to leaving space junk“
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