!We are the aliens...New evidence proves that the genes of life on Earth came from space
Scientists are still researching about the origin of the first life on Earth, so they come up every period with new evidence and theories, the latest of which is a study conducted by a team led by scientists from Hokkaido University in Japan, which says that the basic building blocks arrived here from space; And that's after they studied many meteorites rich in carbon.
In the past, nucleobases such as guanine and adenine, the basic components of DNA, have been discovered in meteorites, but other nucleobases, known as pyrimidines, have not been detected in meteorite samples until now.
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In this new study, published today in the journal Nature Communications, the researchers used modern and highly sensitive analytical techniques for these meteorites, enabling them to determine traces of nuclear bases on a small scale.
The researchers analyzed 3 carbon-rich meteorites: the Murchison meteorite that landed in Australia in 1969, the Murray meteorite that landed in Kentucky in 1950, and the Tagish Lake meteorite that fell to Earth in 2000, and landed in British Columbia.
Besides nuclear bases already discovered in other meteorites, the researchers identified previously undiscovered pyrimidines, including cytosine and thymine, the other two bases found in the DNA molecule.
The team wrote that experiments simulating the contents of space materials suggested the presence of several nuclear bases outside, "indicating that these classes of organic compounds are ubiquitous in extraterrestrial environments both inside and outside the solar system."
"It's a remarkable discovery, tantamount to discovering all the primary RNA bases in the same meteorite," says lead author Yasuhiro Oba, of Hokkaido University.
The authors suggest that during the Late Heavy Bombardment of the early Earth, roughly 4 to 3.8 billion years ago, a variety of such masses could have been delivered to our planet via meteorite collisions.
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"Therefore, the influx of such organic matter played an important role in the chemical evolution of the early Earth," they wrote.
We will learn more about this idea after studying more extraterrestrial materials, and the uncontaminated samples will allow researchers to determine if these particles could have been brought here by meteorites.
https://www.arageek.com/news/we-have-even-more-evidence-life-s-building-blocks-arrived-on-earth-from-space?fbclid=IwAR1fv3H-Wn5q4gWOE3BvNeFWzmgol1q4wfoXaHVyWz7iZvCUSS6HI-VYl2Q