4. THEORY OF COSMOZOIC: This theory was put forward by Richter and strongly supported by Arrhenius. The theory assumes that life was present in the form of resistant spores and appeared on earth from other planet. Since the condition of earth was supporting the life, these spores grew and evolved into different organisms. This theory was also known as “theory of panspermia or spore theory”. The theory initially got the support from the fact that fossils of microorganism were found in meteorites in 1961. But no mechanism is known about the transfer of spores from other planet or whether these spores could survive the journey in space. The absence of life forms on any planet except earth and no details about the spores, its origin and mechanism of crossing interplanetary space and reaching earth. In addition, this theory doesn’t add much into the fundamental details about origin of life. No scientific experiment were given to support the theory. As a result, the hypothesis didn’t receive much attention.

 

Figure 3.4 : Pasteur’s Experiment to disprove the theory of abiogenesis.