When did the first living organisms come about?

The Archean era is the second longest (900 million years) after the Proterozoic. Its ending is more than 2.5 billion years from our time. The first living organisms arose in the Archean era. They were mainly heterotrophs and used organic compounds of the “primary broth” as food, as well as chemoautotrophs synthesizing a certain amount of organic molecules from inorganic ones due to the energy of chemical bonds of inorganic compounds. Conditions on the ancient Earth changed, and the abiogenic occurrence of organic molecules and inorganic on a planetary scale ceased. Separate small loci remained, mainly at the bottom of the ocean, where the formation of simple organic compounds still takes place, but their contribution to providing heterotrophs with food is almost negligible.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.