American scientists found new evidence on Mars.

Scientists of the National Aeronautics and Space Administration (NASA) of the United States have recently produced new evidence to prove that life does exist on Mars, the neighbor of the earth: they found petrified simple bacteria in a Martian meteorite that fell to the earth 1.3 million years ago. It is expected that NASA will officially announce these research results next Monday (165438+1October 30th). This news may add confidence to those who dream of "immigrating" to Mars.

According to the British Times165438+1October 27th, scientists found new evidence from a Martian meteorite discovered in Antarctica in 1984. It is reported that this meteorite named "Allen Hills 8400 1" is a rock on the surface of Mars. Maybe it was hit by a comet or an asteroid and flew to earth. It took160,000 years on the way, and it has been130,000 years since it landed on the earth. The chemical composition of the meteorite is consistent with the analysis results of Martian atmospheric samples collected by humans in the 1970s, so it can be concluded that it comes from Mars.

Scientists found a worm-like structure in this meteorite and speculated that it was probably a petrified bacterium. These bacteria were found below the surface of the meteorite, which means that they existed when the meteorite arrived on the earth, rather than being invaded by bacteria on the earth in later years. Previously, many people held this view that these bacterial substances may have been eroded by bacteria on the earth.

David Mackay, a scientist at NASA's Johnson Space Center, said: "This is strong evidence that there is life on Mars."

As early as 1996, MacKay and other scientists pointed out that the microfossils in this meteorite may be evidence of the existence of life, but many people are skeptical about this view and think that these similar biological structures may not be creatures.

Now, McKay and other scientists have made further research by using high-definition electron microscope and other equipment, and reached new conclusions. They focused on the magnetic crystal structure of several layers on the surface of meteorites, in which bread contains simple bacterial forms. It is found that 25% of these structures are consistent with the chemical form of bacteria.

In addition, scientists have also found evidence of liquid water on Mars from this meteorite, which proves that this red planet may have conditions suitable for life in the past.

These new research results were published in Geochemistry and Cosmic Chemistry, the journal of the Society of Geochemistry and Meteorology, in June165438+1October.

In addition to this "Allen-Hills 8400 1" Martian meteorite, McKay's team also studied two other meteorites from Mars: 19 1 1 Nakhla, which landed in Egypt, and Yamato 593, which was discovered in the Antarctic by Japanese explorers. In the upcoming research results, scientists point out that there is evidence of microbial life in both meteorites.