A new research claims that life on our planet probably came from meteorites, which hit the surface of the earth and landed in small lakes, creating a chemical chain reaction, thereby creating the first piece of genetic code in Earth’s existence.
Although the theory of small hot lakes is not at all a new idea, this latest study joins new data and calculations that prove just how plausible the theory is.
This new study comes from a group of scientists at McMaster University in Canada, together with scientists at the Institute of Astronomy in Germany, who now say that this whole process took place, a few million years after the Earth began to cool down, and then the first water appeared in the liquid state, even as the first continents began to appear.
So far, no one had made any calculations, so there was no tangible evidence. The calculation looked at the possible formation of RNA polymers, which is the most basic type of molecule capable of storing genetic information and catalyzing chemical reactions.
The team believes that it is possible that the impact of meteorites has created organic deposits that have interacted with the water elements of small lakes, provided there was a certain concentration of precipitation and evaporation. The RNA polymers will have later become more complex and transformed into DNA, according to the researchers.
These new calculations put the origin of the first signs of life somewhere between 3.7 and 4.5 billion years ago, which is earlier than was previously estimated, although this is still not an absolute certainty, and still a fairly good study recently predicted that the first organisms appeared on the earth about 4 billion years ago.