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Cosmic panspermia or what?


To complete the 1920 theory of Aleksander I. Oparin (1894-1980) and English scientist John Burdon S. Haldane (1892 - 1964) about the origin of early living beings, Japanese researcher Yoshihiro Furukawa proposed that meteorite impacts on Earth's early oceans may also have been the cause of the formation of complex organic molecules that later originated life.

Unlike the theory of cosmic panspermia, which suggests that the appearance of the first living things on earth came from cosmozoans, which would be floating microorganisms in cosmic space, Yoshihiro and his team explain, in the article published in December 2008 by the British scientific journal. Nature Geoscience, that the impacts of these bodies on primitive seas, very common at the time, may have generated some of the complex organic molecules needed for life.

Although many of the elements needed as starting points for life are present on Earth, little is known about how they were organized into so-called building blocks of life. To try to complete studies in this area, the researchers used a simulator of the impact of an iron and carbon meteorite on a mixture of water and ammonia that mimicked early ocean chemistry. The meteorite, which collided at a speed of 2 km / s, caused pressure and temperature that exceeded 2,760 degrees Celsius.

After the impact, the team found in the fluid a mixture of organic molecules, including a simple amino acid and fatty acid.

From this point, scientists conclude that the impacts of meteorites on water bodies of early Earth may have contributed to the creation of complex organic molecules that formed the basis of life.

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