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Radiation to Mars may have destroyed all evidence of life on the surface.Now NASA needs to dig

https://sputniknews.com/20220629/radiation-on-mars-likely-destroyed-all-evidence-of-life-on-the-surface-now-nasa-needs-to-dig-1096772576.html

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NASA, Mars, Science, Technology

NASA sent five rover to Mars: Sojana, 1997. Spirit and Opportunity, 2004; Curiosity, 2012; And Patience, 2021. Unfortunately, none of them can be dug more than a few inches under the surface of the red planet.

According to NASA, if you want to find evidence of life on Mars, you’ll have to dig down to exactly 6 feet.

Thanks to NASA’s experiments at the Goddard Space Flight Center in Greenbelt, Maryland. Scientists now believe Amino acids near the surface of Mars will decompose much faster than previously thought.

Amino acids are the basis of life. Life on the Organic Earth uses amino acids to make proteins and uses them to make enzymes that regulate chemical reactions and structures. Finding amino acids on Mars cannot prove that life exists on Earth, because amino acids can exist without life, but that is strong evidence.

Scientists question existing theories about the origin of Mars in a new discovery of a meteorite 200 years ago.

However, Martian amino acids are exposed to cosmic rays from the Sun, destroying them and the traces they have ever existed. The Earth’s magnetic field and thick atmosphere protect amino acids and all life from cosmic rays emitted by the Sun. However, Mars currently has no magnetic field, and its atmosphere is thinner and more unstable than we are.

But scientists don’t believe it has always been the case. Most scientists believe that Mars once had a thick atmosphere and magnetic field. It makes them believe that the red planet may have been habitable long ago, with evidence that the planet once had water on its surface.

Mars rover currently looking for life on Earth can only dig a few inches below the surface. NASA scientists believe that geologically speaking, it only takes 20 million years to erase the evidence that the harmful rays of the sun penetrate the surface and the amino acids are present there.

In fact, they estimate that amino acids near the surface before 100 million years ago are likely to have been completely destroyed by the sun’s cosmic rays. Although 100 million years may seem like a long time, scientists believe that billions of years have passed since Mars resembled a habitable planet.

If scientists can dig quite deep, they may be able to find some amino acids. Two meters, or just over six feet, is the distance they believe that if amino acids are present on Mars, we must dig to find them.

Photograph of Mars Crater taken by NASA's Mars Reconnaissance Orbiter-Sputnik International, 1920, 27.05.2022

Why is Mars dry?New research gives clues

Previously, scientists believed that evidence of amino acids would survive much longer, but in this new experiment, amino acids were taken and mixed in test tubes with soil intended to mimic Martian soil. Then they blew it up with radiation equivalent to 80 million years of exposure on Mars. Previous experiments only blasted amino acids without soil simulation, which may have resulted in inaccurate estimates of their survival rates.

“The addition of silicates, especially those containing perchlorate, has been found to significantly increase the rate of amino acid destruction,” said Alexander Pavlov, lead author and physicist of the paper. increase.

Amino acids were previously discovered off-planet. Scientists have observed them in the atmosphere of the asteroids Rugu and Comet 67P. Amino acids are also found in meteorites that are thought to come from Mars, and scientists aren’t sure, but they don’t think they come from Mars and pollute the Earth.

If NASA wants to find amino acids on Mars, they need to send something that can dig deeper than their current rover.



https://sputniknews.com/20220629/radiation-on-mars-likely-destroyed-all-evidence-of-life-on-the-surface-now-nasa-needs-to-dig-1096772576.html Radiation to Mars may have destroyed all evidence of life on the surface.Now NASA needs to dig

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