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( Origin of life)
In the natural sciences, abiogenesis, or origin of life, is the study of how life on Earth emerged from inanimate organic and inorganic molecules. Scientific research theorizes that abiogenesis occurred sometime between 4.4 [2] and 2.7 billion years ago, when the ratio of stable isotopes of carbon (12C and 13C), iron (56Fe, 57Fe, and 58Fe) and sulfur (32S, 33S, 34S, and 36S) points to a biogenic origin of minerals and sediments[3][4] and molecular biomarkers indicate photosynthesis.[5][6] Abiogenesis is a limited field of research despite its profound impact on biology and human understanding of the natural world. Progress in this field is generally slow and sporadic, though it still draws the attention of many due to the eminence of the question being investigated. Several hypotheses have been proposed, most notably the iron-sulfur world theory (metabolism first) and the RNA world hypothesis (genetics first).[7] Until the early 19th century people frequently believed in spontaneous generation of life from non-living matter. Classical notions of abiogenesis, now more precisely known as spontaneous generation, held that complex, living organisms are generated by decaying organic substances; according to Aristotle it was a readily observable truth that aphids arise from the dew which falls on plants, fleas from putrid matter, mice from dirty hay, crocodiles from rotting logs at the bottom of bodies of water, and so forth.
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Origin of life Subcategories
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Origin of life Articles
Yoga: Origins of Yoga by Nicholas Tan
Today’s society is much faster paced that ever before. People have more stress problems which lead to more health problems, mental and physical. There are more concerns with toxicity in the food we eat and the air we breathe. Millions of Americans...
Origins and Causes of Bad Breath by I C
Bad breath, also known as halitosis is a very common condition amongst people who in one way or another neglect their oral habits, as you might have assumed bad breath can be solved by following basic oral hygiene procedures such as brushing your tee...
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