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Proof of Martian meteorite life theory revealed by new research

In 1996, a NASA-led team announced that the organic compounds contained in the Martian meteorite seemed to be left behind by living things.

Cape Canaveral, Florida — 4 billion years old Meteorite from Mars What caused the splash here on Earth decades ago, after all, does not contain evidence of ancient primitive Martian life, Scientists reported on Thursday..

1996, NASA-led team announces The organic compounds in the rock appeared to have been left behind by the creatures. Other scientists were skeptical, and researchers had stripped that premise for decades, most recently lacking by a team led by Andrew Steele of the Carnegie Science Center.

Small samples from meteorites show that carbon-rich compounds are actually the result of water (probably salty or salty water) flowing over rocks for extended periods of time, Steele said. The findings are published in the journal Science.

Early in the wet past of Mars, at least two impacts occurred near the rocks, heating the surface around the planet. Then, on the third impact, Mars bounced from the red planet into space millions of years ago. A four-pound (2 kilogram) rock was discovered in 1984 in Antarctica.

According to researchers, while the groundwater was still on Mars, it moved through rock crevices, forming small masses of carbon that existed. They said the same could happen on Earth and could help explain the presence of methane in Mars’ atmosphere.

However, the two scientists who participated in the original study had problems with these latest findings and called them “disappointed.” In a shared email, they said they supported the 1996 observations.

“The data presented gradually increase our knowledge of (meteorites), but the interpretation is largely new and unsupported by research,” said a space materials researcher at NASA’s Johnson Space Center in Houston. Kathie Thomas-Keprta and Simon Clemett write.

“Unsupported speculations do nothing to solve the conundrum surrounding the origin of organic matter,” they added.

According to Steele, technological advances have enabled new discoveries in his team.

He praised the measurements by former researchers, stating that the hypothesis claiming their life was “a rational interpretation” at the time, and he and his team, including scientists from NASA, Germany and the United Kingdom, said they The result of “What are they, it is a very exciting discovery about Mars, not a study to disprove the original assumptions.

This discovery is “very important in understanding how life began on this planet, in refining the techniques needed to find life on Mars, or elsewhere in Enceladus and Europa. It helps, “Steel said in an email, referring to satellites with Saturn and Jupiter’s underground seas. ..

According to Steele, the only way to prove if Mars had microbial life is to bring a sample to Earth for analysis. NASA’s Perseverance Mars rover has already collected six samples to return to Earth in about a decade. I need 3 dozen samples.

Millions of years after drifting in space, meteorites landed on the Antarctic ice fields thousands of years ago. The small grey-green fragment was named after the hill in which it was found — Allan Hills 84001 —.

Just this week, part of this meteorite was used in the first experiment at the International Space Station. A mini-scanning electron microscope examined the sample. Thomas-Keprta was operated remotely from Houston. Researchers want to use a microscope to analyze geological samples of space (for example, one day’s moon) and debris that can destroy station equipment or endanger astronauts. thinking about.

The Associated Press’s Department of Health Sciences is supported by the Science Education Department of the Howard Hughes Medical Institute. AP is solely responsible for all content.

Proof of Martian meteorite life theory revealed by new research

Source link Proof of Martian meteorite life theory revealed by new research

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