What is Darwin's theory?

Some people put forward the hypothesis that human ancestors did not live on land during the fossil blank period, but lived in the ocean. Their reason is that 8 million to 4 million years ago, a large area of land in Africa was flooded by seawater, forcing some ancient apes to live in the sea and evolved into sea apes. Millions of years later, the sea receded and the sea apes returned to land. They are the ancestors of mankind. This is the "sea ape theory". In recent years, a series of discoveries have revived people's enthusiasm for the theory of extraterrestrial origin of life. First of all, although life is diverse, they all have similar cell structures, which makes people have to ask: since life on earth evolved from inorganic substances, why not produce diverse life patterns? Secondly, the content of gold in the earth is very low, but molybdenum plays an important role in life. What's the significance of this X? In the county, organic matter originated from interstellar space was found in the reward stone falling from the sky, including all the elements that make up life on earth. This makes people believe that it is not just the monopoly of the earth. The hypothesis that human beings originated from aliens was put forward by western scientist Mareuse in recent years based on a 50,000-year-old skull fossil found in San Diego.