This figure shows the Precambrian stromatolites found in Glacier National Park (USA). In 2002, in the journal Nature argued that the age of the geological formation is 3.5 billion years old, and there are traces of fossilized cyanobacteria. If so, then perhaps this is the very first traces of life on earth.
The origin of life on earth — the universal concern of people for many millennia. Almost all people have legends and stories about it, these stories can be found in the ancient scriptures such as the Bible, Koran, etc. Now do not stop a heated debate as to how life originated on Earth. The main point of contention is the question: how could it be an accident?
Biochemical evolution proponents argue that it is possible. But it creates a lot of problems, chief among them — disconnect probability of the event. Mathematical calculation clearly shows the impossibility of accidental even the simplest cell structure based on the currently known mechanisms. The main hope of the supporters of the biochemical evolution is that in the future science will discover more plausible mechanisms that make spontaneous generation of life and the subsequent evolution of the possible, but at the moment science, such mechanisms are unknown. Nowadays, there are many models of biochemical evolution, but none of them was fully supported scientists.
In light of the above, all the more prevalent hypothesis creationism or intelligent design hypothesis (Intelligent Design). She claims that life on earth came as a consequence of the intervention of a mind, what can be concluded based on the complexity and soundness of the living cell, by the presence of vast amounts of information that serves as a kind of blueprint for the construction of living organisms. Despite statements of a significant part of scientists that this hypothesis is unscientific, many prominent scientists, including biochemists, molecular biologists, mathematicians, physicists, and others, support it, as it is based on a clear mathematical analysis and probability calculations.
There is also a hypothesis, called panspermia. It suggests that life has been brought to Earth from space. This hypothesis was first proposed in 1865 by the German scientist G. Richter, and subsequently revised and supplemented by many scientists. The most famous version of it offered by Francis Crick and Leslie Orgel in 1973. Problem with this hypothesis is that, in fact, it does not solve the issue, but simply moves it to another location in the universe.
Each of these hypotheses has many models and variations. But, nevertheless, the question of the origin of life on earth is still no scientific answer.