According to the current known situation of mankind, life on the earth first appeared 3.8 billion years ago, by a simple single-cell life development and evolution, in the middle has experienced dozens of species extinction events of large and small sizes, life has developed in the ebb and flow of the tide, there are species extinction disappeared on the stage of history, there are also species development and growth to rule the earth in an era, to today there are millions of species on the earth, showing a vibrant and peaceful scene.

When a species develops to a certain extent, it pursues three questions as much as possible: Who am I? Where am I from? Where am I going?
At the beginning, the scientific system had not yet been established, and human beings took a very simple and violent approach to everything that happened to us in life, that is, fictional stories deceived themselves, which is the essential reason why all peoples and countries have mythological stories. For example, Western countries initially believed that human beings were created by God, and in China there are also myths and stories of Nüwa creating people.

In fact, the root cause is because it is unknown, so it must be fictional!
In the 18th century, Darwin and other naturalists and biologists broke the monopoly of theology and completely snatched us out of God's hands, believing that human beings evolved from ancient apes. In that society such views were to be attacked, so many nobles ridiculed Darwin and painted him in the form of a monkey.

Darwin's theory of biological evolution made mankind aware of the development and evolution of life on Earth, which is generally a process from simple to complex, from low to high, from aquatic to terrestrial, which can be understood as the process of life from 1 to infinity.
But there have been many opinions about the process of Earth life from "0" to "1", and there have been many opinions that Earth life may have originated outside of Earth, and multiple pieces of evidence found over the years have also proved this. Of course, the main thing mentioned here is the "source of life", that is, the basic elements that make up life, such as amino acids, proteins, DNA, RNA, etc.

Recently, according to a report by the Japanese Ministry of Education, Culture, Sports, Science and Technology, scientists have found the presence of amino acids in the samples collected by the asteroid probe Hayabusa-2, with more than 20 species.
Japan has done relatively well in the field of asteroid exploration, and the Hayabusa-1 and Hayabusa-2 asteroid probes have achieved certain results. In particular, Hayabusa-2, which departed from Earth in December 2014, arrived at the Ryugu asteroid in 2018 after several years of flight, performed impact contact sampling in 2019, and returned to Earth in December 2020.

At this point in time, it is still more interesting, and the mainland's Chang'e 5 is also a mission in December 2020, collecting 1731 grams of samples from the moon. However, Hayabusa2 collected fewer samples, about 5.4 grams of black sand-like substance.
Even so, scientists are very happy, because the impact sampling means that the sample may not be taken, then the round trip means that the play is in vain, and now a few samples are at least better than empty.

Several scientific research institutions in Japan studied the 5.4 grams of samples, and initially found that these black sand particles contained compounds of organic substances carbon and nitrogen, and also found the presence of water in the samples.
According to the latest news in June this year, scientists found a large number of amino acids in these samples, more than 20 kinds. We know that amino acids are the basic substances that make up proteins, and proteins are the basic structure of living organisms, and any life is indispensable to the participation of proteins.

The key to this discovery is that the samples were collected directly from outside the Earth, and the whole process is sealed without contact with the biological resources of the Earth, which means that the "source of life" from outside the Earth has been confirmed for the first time.
The "source of life" comes more from extraterrestrial evidence
Samples have been collected from celestial bodies outside the Earth, and there have been 13 times in human history so far, including 6 lunar samples collected during the Apollo manned lunar landing, 3 samples collected from the moon by the Soviet Union's unmanned probe, and 1 sample collected from the moon by China's Chang'e-5 probe. There were three samples taken on the asteroid, Japan's Hayabusa-1 and Hayabusa-2, both of which have returned, while NASA's asteroid probe, which is targeting Bennu, is currently on the return journey.

In March 2020, a team of researchers in the United States discovered an alien protein "hemolithin" in meteorites, which was discovered in Algeria in 1990 and named Acfer 086, which is rich in iron and lithium.
Scientists believe that the "resources" that make up life on Earth are likely to be brought to Earth by comets or asteroids.
In another study, scientists studied the Murchison meteorite that fell near Murchison in Australia in 1969 and the NWA 801 meteorite found in Morocco in 2001, and found that the two meteorites were very old, even older than Earth, more than 4.5 billion years old. Scientists have found the presence of ribose as well as trace amounts of xylose and arabinose in both meteorites.

Ribose is an important part of RNA and is a very important class of biomolecules for life, except for acting as genetic material in some viruses, they act as messengers in almost all life, helping DNA express genetic information and eventually synthesize proteins needed by the body.
At present, the basic material needed for life on Earth may be brought to Earth by asteroids or comets, and eventually form life in the primordial ocean. #Amino acids found in Hayabusa II sample#
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