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Meaning: "where"), locative of root *kwo-, stem of relative and interrogative pronouns. As an interjection of surprise or emphasis, See more definitions.
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Relatedly, when disease is widespread, epidemiological studies investigate what associated factors, such as location, sex, exposure to chemicals, and many others, make a population more or less likely to have an illness, condition, or disease, thus helping determine its etiology. Sometimes determining etiology is an imprecise process.

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In the past, the etiology of a common sailor's disease, scurvy , was long unknown. When large, ocean-going ships were built, sailors began to put to sea for long periods of time, and often lacked fresh fruit and vegetables.

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Without knowing the precise cause, Captain James Cook suspected scurvy was caused by the lack of vegetables in the diet. Based on his suspicion, he forced his crew to eat sauerkraut , a cabbage preparation, every day, and based upon the positive outcomes, he inferred that it prevented scurvy, even though he did not know precisely why.

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It took about another two hundred years to discover the precise etiology: the lack of vitamin C in a sailor's diet. The following are examples of intrinsic factors: - Inherited conditions, or conditions that are passed down to you from your parents. An example of this is hemophilia, a disorder that leads to excessive bleeding.

These are abnormalities in the chemical signaling and interaction in the body. For example, Diabetes mellitus is an endocrine disease that causes high blood sugar.

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An etiological myth, or origin myth, is a myth intended to explain the origins of cult practices, natural phenomena, proper names and the like. For example, the name Delphi and its associated deity, Apollon Delphinios , are explained in the Homeric Hymn which tells of how Apollo, in the shape of a dolphin delphis , propelled Cretans over the seas to make them his priests.


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While Delphi is actually related to the word delphus "womb" , many etiological myths are similarly based on folk etymology the term " Amazon ", for example. The story of Prometheus ' sacrifice trick at Mecone in Hesiod 's Theogony relates how Prometheus tricked Zeus into choosing the bones and fat of the first sacrificial animal rather than the meat to justify why, after a sacrifice, the Greeks offered the bones wrapped in fat to the gods while keeping the meat for themselves.

In Ovid 's Pyramus and Thisbe , the origin of the color of mulberries is explained, as the white berries become stained red from the blood gushing forth from their double suicide.

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From Wikipedia, the free encyclopedia. Not to be confused with Etymology.


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Study of causation, or origination. All previous examples had been one-off events. The repeating FBR was eventually traced back to a dwarf galaxy with a high rate of star formation 3 billion light-years away, Nimmo said. The galaxy contains a persistent radio source, possibly a nebula, that could explain the FRB's origin, she added.


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    7. Astronomers have also managed to determine that three non-repeating FRBs came from distant massive galaxies with little star formation going on. This seemed to provide evidence that repeating and non-repeating FRBs arose from different types of environments, Nimmo said. But the new discovery challenges this simple story.

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    FRB Follow-up observations by a network of telescopes in Europe allowed the research team to produce a high-resolution image of the FRB's location. This location turned out to be a medium-sized spiral galaxy like our Milky Way that is surprisingly nearby, only million light-years away, making it the closest-known FRB to date. The results were published yesterday Jan. Despite precisely locating the FRB, the team was unable to detect any radio sources in the spiral galaxy that could explain the mysterious outbursts. Even worse, this new entity seems not to fit the patterns established by previous repeating and non-repeating FRBs.

    The researchers hope that subsequent data might help them get a handle on what this FRB is telling them.