By Andrea Hargraves 
With the abiogenesis hypothesis disproved, another theory gained strength. He says that some molecules important for life may have been produced outside of Earth and that they reached the planet by hitchhiking on meteorites or comets. British.
At the end of the 19th century, according to BritishSwedish chemist Svante Arrhenius proposed that life on Earth originated from panspermia, that is, microscopic seeds of life found throughout the universe capable of traveling through space, from planet to planet or from solar system to solar system.
There is evidence to support this theory. According to the University of Chicago, research from NASA’s Ames Research Center published investigations showing that complex organic compounds were readily produced under conditions similar to those that existed – most likely – in the early solar system, when many known meteorites formed.
In 1969, for example, the Murchison meteorite, which fell in Australia, contained dozens of different amino acids, molecules that make up proteins and are considered the building blocks of life.
In 2019, according to the University of Chicago, a team of researchers from France and Italy reported finding preserved extraterrestrial organic matter in 3.3 billion sediments in South Africa. The team suggested that micrometeorites were the likely source of this material. More evidence of this kind has emerged in 2022 from samples from the asteroid Ryugu, brought to Earth by the Japanese Space Agency’s Hayabusa2 mission. The number of amino acids found in Ryugu’s samples exceeded 20 different species.
If this theory is confirmed, it would be a milestone in answering another question about the origin of life, which is whether we are alone in the universe or whether other forms of life could have existed out there.
Finally, one of the most accepted theories for the origin of life today is that the first organisms arose by chemical processes made possible by the conditions of the primordial Earth.
theory according to Britishsays that the composition of the Earth’s atmosphere and temperature conditions in the first million years of its existence made the non-biological production of organic molecules possible.
The first experimental simulations of conditions on Earth were performed as early as 1953 at the University of Chicago, the Foundation article reports, by a graduate student, Stanley Miller, and his chemist professor, Harold Urey.
According to the foundation, it is believed that in the early days of the planet, there was a much greater abundance of hydrogen, which was later lost to space. It is possible that the carbon, nitrogen and oxygen atoms were present in the form of methane, ammonia and water.
So, researchers Miller and Urey injected ammonia, methane, and water vapor into a sealed glass container to simulate this scenario, forming what became known as a “primordial soup.” Then they ran electrical sparks through the container to simulate lightning, which is also thought to have been more frequent on early Earth.
This action gave rise to several amino acids and hydroxy acids, chemicals familiar to contemporary life on Earth, suggesting that this process paved the way for the molecules needed to produce life.