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The Silurian hypothesis is a thought experiment, [1] which assesses modern science's ability to detect evidence of a prior advanced civilization, perhaps several million years ago. The most probable clues for such a civilization could be carbon , radioactive elements or temperature variation.
[500]: 41 It has since been debunked as pseudoscience [501]: 2 and part of the edifice of scientific racism. [ 502 ] Melanin theory – belief founded in the distortion of known physical properties of melanin, a natural polymer, that posits the inherent superiority of dark-skinned people and the essential inhumanity and inferiority of light ...
Hederelloids enjoyed significant success in the Silurian, with some developing symbioses with the colonial rugose coral Entelophyllum. [65] The Silurian was a heyday for tentaculitoids, [66] which experienced an evolutionary radiation focused mainly in Baltoscandia, [67] along with an expansion of their geographic range in the Llandovery and ...
Out of Asia theory of human origin – The majority view is of a recent African origin of modern humans, although a multiregional origin of modern humans hypothesis has much support (which incorporates past evidence of Asian origins). Scientific racism – the theory that humanity consists of physically discrete superior or inferior races.
The "mysteries" cited as evidence for the hypothesis can be explained without having to invoke ancient astronauts; proponents look for mysteries where none exist. [9] Since ancient astronauts are unnecessary, Occam's razor should be applied and the hypothesis rejected according to the scientific consensus. [52]
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Silurian hypothesis, a thought experiment that speculates if a prior advanced civilization on Earth would leave behind present day evidence of its existence; Silurian Hills, a small range of hills in the Mojave Desert; Siluria Technologies, a San Francisco-based technology company; Eriopygodes imbecilla, the Silurian, a moth of the family Noctuidae
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