This is hard to do, since we have never seen any ET life forms. What we do find in space is some of the more simple chemicals that make up living things. Because nobody has been able to figure out how these chemicals could ever form here on earth, many evolutionists claim that they must have come here from outer space. Pizzarello and others were disappointed that after a full year of study, they couldn't find very many of the chemicals important for life. Even if asteroids filled the earth with these chemicals, evolutionists still have the problem of figuring out how simple amino acids could combine to make proteins, which are essential to life.
Membranes are more than just grease bubbles.
Many in the past have tried to answer these questions Oparin, Miller, Urey. Their experiments are famous in our high school and college science textbooks, but modern biologists know that they really never did answer the question. That's why some evolutionists are now looking to the stars. Others are still betting on the sea. Harold Morowitz and Robert Hazen, of George Mason University, have suggested that metal catalysts around hot geysers on the ocean floor could have caused the chemical reactions that could make the starting chemicals of life.