origin of life
Cited: Bada JL, Lazcano A. Origin of life. Some like it hot, but not the first biomolecules. Science June 14, 2002; Vol. 296: pp. 1982-1983. (Secondary Source) This article traced the many theories regarding the origin of life, with particular focus on the soup theory. Their discussion further delved into the debate over whether metabolic or genetic/replication molecules were the first to form, with the “metabolist” theory putting forward the notion that metabolic life was first and was formed in elevated temperatures near the Ocean floor. However as the article notes, there are limitations to the evidence that supports this theory, but ultimately, the limited information that scientists have currently is a prime reason for a lack of a definitive origin of life answer. Huber C, Wächtershäuser G. July 31, 1998 Peptides by activation of amino acids with CO on (Ni,Fe)S surfaces: implications for the origin of life. Science Vol. 281, pp. 670–672. (Primary Source) The results from this paper regarded experiments modeling volcanic or hydrothermic settings amino acids indicated that peptides could be formed by the use of (Ni,Fe)S and CO with H2S at 100 degrees C under anaerobic conditions. The author of this paper indicates that these were relevant geothermic conditions and that the results support a thermophilic origin of life. This relates to the other articles as it is an attempt to provide evidence for the “metabolistic” theory of the origin of life. Wade, Nicholas. "New Glimpses of Life’s Puzzling Origins." The New York Times. The New York Times, 16 June 2009. Web. 12 Feb. 2013. (Press Source) This article talked about the various methodologies and theories regarding the origin of life, including terrestrial explanation theories regarding, chemical replicating systems, and prebiotic chemistry of ocean environments. The article showed optimism for terrestrial explanation of the origin of life due to surprising advances in recent years, including a series of discoveries about the cell-like structures that could have formed naturally from fatty chemicals that was present in primitive Earth. This article relates to the secondary article as they cover the same topics, furthermore this article directly relates to the primary source since it references and critiques Wachterhauser’s work and theory.