The Origin of Life: Not so Simple (Part II)
Writing in Scientific American Robert Shapiro recounts many criticisms of popular models for the chemical origin of life. Part I recounted why many origin of life theorists reject the possibility that DNA was the first genetic molecule. As noted, Shapiro even takes aim at those who suggest that the Miller-Urey experiment chemistry was important for forming prebiotic molecules on meteorites because studies of these meteorites show “a bias toward the formation of molecules made of fewer rather than greater numbers of carbon atoms, and thus shows no partiality in favor of creating the building blocks of our kind of life.” Due to these deficiencies, Shapiro then notes that increasing numbers of prebiotic chemists now turn to RNA as the first Read More ›