Richter proposed ''Cosmozoic theory'' or ''Interplanetary theory'' of origin of life. According to this theory, the life is distributed throughout the cosmos in the form of resistant spores of living forms the cosmozoa.
Van Helmont supported theory of spontaneous generation and described that mice arised from wheat barn and sweaty shirt kept in a pot for 21 days in dark. Pasteur performed an experiment and said that life arised life by theory of biogenesis. Arrhenius supported theory of Danspermia.