Search results
Results From The WOW.Com Content Network
The likely answer to this challenge is that the evolutionary process could have involved molecular self-replication, self-assembly such as of cell membranes, and autocatalysis via RNA ribozymes. [ 5 ] [ 6 ] [ 11 ] Nonetheless, the transition of non-life to life has never been observed experimentally, nor has there been a satisfactory chemical ...
Antonie van Leeuwenhoek. Traditional religion attributed the origin of life to deities who created the natural world. Spontaneous generation, the first naturalistic theory of abiogenesis, goes back to Aristotle and ancient Greek philosophy, and continued to have support in Western scholarship until the 19th century. [15]
The junkyard tornado argument uses a calculation of the probability of abiogenesis based on false assumptions, as comparable to "a tornado sweeping through a junk-yard might assemble a Boeing 747 from the materials therein" and to compare the chance of obtaining even a single functioning protein by chance combination of amino acids to a solar ...
Disliking the randomness and unpredictability implied by the term spontaneous generation, in 1870 Bastian coined the term biogenesis for the formation of life from nonliving matter. Soon thereafter, however, the English biologist Thomas Henry Huxley proposed the term abiogenesis for this same process, and adopted biogenesis for the process by ...
Although alternative chemical paths to life have been proposed, [8] and RNA-based life may not have been the first life to exist, [3] [9] the RNA world hypothesis seems to be the most favored abiogenesis paradigm. However, even proponents agree that there is still not conclusive evidence to completely falsify other paradigms and hypotheses.
Sidney Walter Fox (24 March 1912 – 10 August 1998) was a Los Angeles-born biochemist responsible for discoveries on the origins of biological systems. Fox explored the synthesis of amino acids from inorganic molecules, the synthesis of proteinous amino acids and amino acid polymers called "proteinoids" from inorganic molecules and thermal energy, and created what he thought was the world's ...
A scenario is a set of related concepts pertinent to the origin of life (abiogenesis), such as the iron-sulfur world. Many alternative abiogenesis scenarios have been proposed by scientists in a variety of fields from the 1950s onwards in an attempt to explain how the complex mechanisms of life could have come into existence. These include ...
Thomas Gold, in a 1999 book, cited the discovery of thermophile bacteria in the Earth's crust as new support for the postulate that these bacteria could explain the existence of certain biomarkers in extracted petroleum. [6] A rebuttal of biogenic origins based on biomarkers has been offered by Kenney, et al. (2001). [16]