What is the origin of life?
It is assumed that the origin of life has occurred sometime between 4.4 billion years, when the oceans and continents have just begun to form, and 2.7 billion years ago, when it is widely accepted that microorganisms existed in huge numbers due to their influence on isotopes in the respective layers. Where exactly to 1.7 billion years of life can be found, it is less certain. The controversial document published in 2002 by the paleontologist UCLA William Volki claimed that the corrugated geological formations called Stromalites in fact contain a 3.5 billion -year -old fossilized microbes of algae. Some paleontologists disagree with the conclusions of the capacity and estimate the first life at about 3.0 billion years instead of 3.5 billion.
The evidence from the ISUA Supercrustal Belt in Western Greenland indicates an even earlier date for the origin of life - 3.85 billion years ago. S. Mojzis makes this estimate based on isotopes concentrations. Because life preferredillials uptacts of isotope carbon-12, an area where there is life,They contain higher than-normal carbon ratio-12 to its heavier isotope, carbon-13. This is well known, but the interpretation of sediments is less direct and paleontologists are not always the same at the conclusions of their colleagues.
We do not know the exact geological conditions of this planet 3 billion years ago, but we have a rough idea and we can re -create these conditions in the laboratory. Stanley Miller and Harold Urey created these conditions in their famous 1953 investigation, Miller-Surey experiment. Using a highly reduced (unoxenated) mixture of gases such as methane, ammonia and hydrogen, these scientists synthesized basic organic monomers such as amino acids, in a completely inorganic environment. The amino acids are now freely floating amino acids far from the self -healing metabolism of microorganispians, but at least suggest how things could begin.
in large warm oceans of early Earth would be quinliones youChto molecules accidentally knocked down and combined, eventually created a basic protonom of some kind. However, this hypothesis is confused by the fact that the environment created in the Miller-Aure experiment had a high concentration of chemicals that would prevent the formation of complex polymers from monomer building blocks.
In the 1950s and 1960s, another research worker created Sidney Fox in the laboratory and studied dynamics. He observed spontaneous formation of peptides from amino acid precursors and saw that these chemicals were sometimes organized in microspés or closed spherical membranes that suggested were incel. If certain microsfers were formed that were able to support the growth of other microsframes around them, it would be the primiform of self -epicing and eventually took over Darwin's evolution and create effective self -promoters such as today's cyanobacteria.
6 Evidence is that RNA can store information and catalyze chemical reactions. Its basic importance in modern liveVota also suggests that today life could develop from the precursors of All-Star.The origin of life remains a hot topic for research and speculation. Perhaps one day there will be enough evidence or smart enough to learn how it really happened.