The earth was born 4.6 billion years ago. At first, the earth's surface was in a molten state, and volcanic activity was particularly intense, gradually releasing a large number of gases, mainly water vapor, hydrogen, carbon monoxide, ammonia, methane, hydrogen sulfide and other organic substances. This situation lasted for a long time, so the early development stage of the earth was always anoxic. A large amount of this organic matter is gathered in the primitive ocean, and volcanoes, lightning and solar ultraviolet rays can release a lot of energy. Under the action of these energies, these substances gradually form ethanol, fat, hydrocarbons, amino acids and protein-like substances. These substances are mixed together, which scientists call "organic soup". A certain polymerization formed a nucleic acid macromolecule in the "organic soup". This nucleic acid molecule can replicate itself. The copied nucleic acid still carries the structural code of the parent nucleic acid. This coding can polymerize many amino acid molecules into protein macromolecules, and protein forms protective films and subsidiary structures outside nucleic acids. This is the first cell and the earliest life.