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Topic: Single origin theory

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Multiregional hypothesis

Mitochondrial Eve

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	Big Bang Theory - MSN Encarta
		The theory is based on the mathematical equations, known as the field equations, of the general theory of relativity set forth in 1915 by Albert Einstein.
		Scientists are searching for a theory that merges gravity (as explained by Einstein's general theory of relativity) and quantum mechanics but have not found one yet.
		A single force existed at the beginning of the universe, and as the universe expanded and cooled, this force separated into those we know today: gravity, electromagnetism, the strong nuclear force, and the weak nuclear force.
	encarta.msn.com /encyclopedia_761570694/Big_Bang_Theory.html (1836 words)

	Theory, Law, Fact and the Scientific Method
		The second misunderstanding is that a theory is an "unproven" law or fact, or, in light of the preceding discussion, an unconfirmed law or fact.
		Using his Law of Gravitation and his Theory of Mechanics, Newton was able to explain numerous facts (the motion of the planets in the sky, the movement of the tides, etc.) and laws (Kepler's and Galileo's).
		One sometimes hears the word "theory" used in place of the word "hypothesis" - as in "I have this theory that..." - but this is an abuse of the word, possibly motivated to avoid the pretentious sounding word "hypothesis".
	ola4.aacc.edu /jsfreeman/TheoryandLaw.htm (1642 words)

	Multiregional hypothesis - Wikipedia, the free encyclopedia
		This view contrasts with the single origin hypothesis, which holds that modern Homo sapiens evolved from a single, geographically localised, ancestral hominid population, whose descendants ultimately replaced all other species of hominids over the course of tens of thousands of years without interbreeding or subspeciation.
		However, Coon was explicit in the exposition of his theory that gene flow between populations played a substantial role in human evolution, a point often overlooked by his critics.
		A variation of this theory known as hybrid-origin hypothesis was introduced in 1971 by the British psychologist Stan Gooch.
	en.wikipedia.org /wiki/Multiregional_origin_hypothesis (486 words)

	Abiogenic Origin of Life: A Theory in Crisis
		In the case of the scientific investigation of the cause of the origin of life, we have two difficulties: the conditions under which it occurred are unknown, and presumably unknowable with certainty, and the phenomenon (life) is so complex we do not even understand its essential properties.
		Single cells that are free-living such as amoebae or protozoa must carry on within that single cell all of the functions carried on by entire organisms, and individual cells have digestive, reproductive, respiratory, nervous, skeletal, excretory, muscular, etc. systems on a minute scale that are exceedingly complex.
		Unfortunately for spontaneous origin of life enthusiasts, the preponderance of the amino acids produced by these experiments are either glycine or alanine, the two simplest amino acids, and many non-proteinous amino acids are produced that will compete with the 20 proteinous amino acids in any abiological reactions.
	origins.swau.edu /papers/life/chadwick/default.html (6527 words)

	NEBULAR THEORY - LoveToKnow Article on NEBULAR THEORY (Site not responding. Last check: 2007-10-23)
		In fact a little consideration of the theory of probabilities will show it to be infinitely probable that such an object should really have some movement of rotation, no matter by what causes the nebula may have originated.
		The effect of such contraction would be to draw the materials of the ring into a single mass, and thus we would have a planet formed, while the satellites of that planet would be developed from the stifi nascent planet in the same way as the planet itself originated from the sun.
		The energy due to their separation is thus less in the contracted state than in the original state, and as that energy cannot be lost it must reappear in heat.
	www.1911encyclopedia.org /N/NE/NEBULAR_THEORY.htm (2291 words)

	Theory of Cognitivity - Basis of Mind.Forth Robot AI and Mind.html Tutorial AI
		The original, neonatal sensory inputs to level two of the mind flow first directly into memory nodes in the sensory memory channel and thence indirectly, associatively, via the concrete associative tags, into memory nodes in the abstract memory channel.
		The original level of complexity of the data in the abstract memory channel is on the order of off-or-on and yes-or-no. This irreducibly simple logical content is the mirrored reflection of a jumble of data in the sensory memory channels.
		Thus a single fiber in the abstract memory channel can come to represent a whole class of fibers in the sensory memory channel and lo, an abstract concept is born.
	mind.sourceforge.net /theory5.html (9172 words)

	Grand unification theory Summary
		Grand unification, grand unified theory, or GUT is one of several very similar theories or models in physics that unify what are considered three "fundamental" gauge symmetries: hypercharge, the weak force, and quantum chromodynamics.
		A gauge theory where the gauge group is a simple group only has one gauge coupling constant, and since the fermions are now grouped together in larger representations, there are fewer Yukawa coupling coefficients as well.
		GUT theory specifically predicts relations among the fermion masses, such as between the electron and the down quark, the muon and the strange quark, and the tau lepton and the bottom quark for SU(5) and SO(10).
	www.bookrags.com /Grand_unification_theory (3547 words)

	Another Creation Theory Bites the Dust
		To explain it far too briefly, this is the theory that creation started from a single explosion or expansion of a condensed particle of matter, or a single kernel of energy as it has been called, a seed, smaller than an atom.
		The basis of this theory, as explained scientifically, is that we owe the creation of the universe to the breaking away of the absolute symmetry of the absolute emptiness that existed before the creation began.
		It has been another theory that at first is applauded as the answer to the questions, yet with time is found to be too faulty, typical of the ever-changing scientific process that starts with one theory and in time gives way to something else.
	www.stephen-knapp.com /another_creation_theory_bites_the_dust.htm (1090 words)

	chapter one: what is theory?
		Theory in literary studies is not an account of the nature of literature or methods for its study (though such matters are part of theory and will be treated here, primarily in Chapters 2, 5, and 6).
		Theory in this sense is not a set of methods for literary study but an unbounded group of writings about everything under the sun, from the most technical problems of academic philosophy to the changing ways in which people have talked about and thought about the body.
		Theory is often a pugnacious critique of common-sense notions, and further, an attempt to show that what we take for granted as 'common sense' is in fact a historical construction, a particular theory that has come to seem so natural to us that we don't even see it as a theory.
	academic.brooklyn.cuny.edu /english/farley/gflt/gradfemsite/whatistheory.html (4126 words)

	Understanding String Theory
		The modern theory called the Standard Model of Cosmology states that some 15 billion years ago, the universe emerged from a big bang (enormously energetic singular event) which spewed forth all of space and all of matter.
		But according to string theory, atomic particles and subatomic particles are not pointlike, but instead consists of a tiny one-dimensional filaments somewhat like infinitely thin rubber bands, vibrating oscillating, dancing filament that physicists have named a string.
		In this new millennium, the excitement in the physics community is that string theory may provide the answer for the unified theory of the all the four forces and all matter.
	www.irfi.org /articles/articles_1_50/understanding_string_theory.htm (1649 words)

	Giant Impact Theory of the Origin of the Moon
		However, in 1984, when a scientific conference on the origin of the Moon was organized in Kona, Hawaii, a surprising number of papers were submitted that discussed various aspects of the giant impact theory.
		At the same meeting, the three classical theories of formation of the Moon were discussed in depth, and it was clear that all continued to present grave difficulties.
		The giant impact theory emerged as the "fashionable" theory, but everyone agreed that it was relatively untested and that it would be appropriate to reserve judgement on it until a lot of testing has been conducted.
	www.windows.ucar.edu /tour/link=/teacher_resources/impact_theory.html (896 words)

	Rick Bryan Haraka's Views On String Theory and Consciousness (Site not responding. Last check: 2007-10-23)
		Interest in string theory is driven largely by the hope that it will prove to be a 'theory of everything'.
		This theory is not a metaphysical theory, but a scientific theory supported by great physicists such as Stephen Hawking and is taught at universities throughout the world.
		String theory is a physical model whereby the fundamental building blocks are one-dimensional extended objects (strings) rather than the zero-dimensional points (particles) that were the basis of most earlier physics.
	rickbryan.com /rb/commons/string-theory.htm (1117 words)

	The Origins of Nexus
		One popular theory is that the Architects are looking for some quality, and that zones that go permanently out of phase have either passed the test and been taken to the next stage, or discarded as unworthy.
		Theories not reliant on the important of people generally founder on the rocky fact that only cities (of some description) arrive in or connect to Nexus.
		However, this is considered an unsatisfying theory, as it leaves the question of the origin of Nexus unaddressed.
	www.idiom.com /~trip/gaming/nexus/origin.html (1484 words)

	NOVA's string theory program now available online
		Also known as superstring theory, the startling idea proposes that the fundamental ingredients of nature are inconceivably tiny strings of energy, whose different modes of vibration underlie everything that happens in the universe.
		The theory successfully unites the laws of the large -- general relativity -- and the laws of the small -- quantum mechanics -- breaking a conceptual logjam that has frustrated the world's smartest scientists for nearly a century.
		Witten has described string theory as "a part of 21st-century physics that fell by chance into the 20th century." In fact, the theory is so far ahead of experimental technique that there is as yet no way to verify whether strings are real or a figment of some very creative imaginations.
	www.physlink.com /News/110503NOVAStringTheory.cfm (949 words)

	Linguistics 201: The Origin of Language
		This theory holds that one original language spoken by a single group of Homo sapiens perhaps as early as 150 thousand years ago gave rise to all human languages spoken on the Earth today.
		As humans colonized various continents, this original mother tongue diverged through time to form the numerous languages spoken today. Since many scientists believe that the first fully modern humans appeared in Africa, the mother tongue theory is connected with a more general theory of human origin known as the Out of Africa theory.
		Currently, the theory of evolutionary monogenesis tends to be favored by a group of linguists working in the United States.
	pandora.cii.wwu.edu /vajda/ling201/test1materials/origin_of_language.htm (1756 words)

	Single-origin hypothesis - Wikipedia, the free encyclopedia
		In paleoanthropology, the single-origin hypothesis (or Out-of-Africa model) is one of two accounts of the origin of anatomically modern humans, Homo sapiens.
		Stephen Oppenheimer is one proponent of a single exodus
		The opponents of a single origin argue that interbreeding indeed occurred, and that the characteristics of modern humans, including those that have been and still are perceived by some to distinguish races, could only be the result of genetic contributions from several earlier lineages that evolved semi-independently in different parts of the world.
	en.wikipedia.org /wiki/Single-origin_hypothesis (598 words)

	Theory of evolution - CreationWiki
		The theory of evolution is an explanation for the origin of the cosmos and life on Earth, which is more formally known as the General Theory of Evolution.
		The theory of evolution is a violation of well established scientific and natural laws, such as the law of biogenesis and the second law of thermodynamics.
		The theory of evolution purports that the process of biological evolution acting over hundreds of millions of years has given rise to the plethora of organisms on Earth, and therefore evolutionists believe that all lifeforms share a common ancestry.
	creationwiki.org /Theory_of_evolution (1080 words)

	Giant Impact Theory of the Origin of the Moon (Site not responding. Last check: 2007-10-23)
		However, in 1984, when a scientific conference on the origin of the Moon was organized in Kona, Hawaii, a surprising number of papers were submitted that discussed various aspects of the giant impact theory.
		At the same meeting, the three classical theories of formation of the Moon were discussed in depth, and it was clear that all continued to present grave difficulties.
		The giant impact theory emerged as the "fashionable" theory, but everyone agreed that it was relatively untested and that it would be appropriate to reserve judgement on it until a lot of testing has been conducted.
	windows.ucar.edu /cgi-bin/tour_def/teacher_resources/impact_theory.html (896 words)

	Abiogenesis and the Origin of Life
		Abiogenesis is a theory that attempts to explain the origin of life through random natural processes, and is taught as a regular component of evolutionary biology.
		Spontaneous generation was the original theory that proposed life could originate from nonliving matter.
		Louis Pasteur abolished the theory of spontaneous generation in 1859 because he believed that life was far to complex to have originated instantly from nonliving matter.
	www.nwcreation.net /abiogenesis.html (1173 words)

	Burke, Edmund
		A Philosophical Enquiry into the Origin of our Ideas of the Sublime and Beautiful, by Edmund Burke (1729-97), was the early, revolutionary work of an author who went down in history as both a politician and the arch-theorist of anti-Jacobin conservatism (Reflections on the Revolution in France, 1790).
		Its originality does not consist so much in its approach to the aesthetic problem, essentially a psychological one, with its origins in John Locke, nor in its "Introduction on Taste," added in the second edition.
		At the end of the century, Burke is the single author cited by Immanuel Kant in "Analytic of the Sublime," in his Critique of Judgement (1790).
	www.press.jhu.edu /books/hopkins_guide_to_literary_theory/edmund_burke.html (1498 words)

	Aesthetic Theory of "What Is Art?"
		One of the cornerstones is an aesthetic theory by which Tolstoy hoped to be able to demonstrate whether a given work was or was not a work of art and, if it was, whether it was more or less important.
		The grounds for questioning the value of Tolstoy’s theory of art as a whole are certainly safe, but that they are grounds for discrediting the whole of the theory has not, in my opinion, been demonstrated.
		Tolstoy’s aesthetic theory rests upon a foundation of a priori assumptions, as must any aesthetic which hopes to arrive at a formula for discriminating between what is art and what is not.
	www1.umn.edu /lol-russ/PopLit/aesthetic_theory_of_what_is_art.htm (3985 words)

	Grand Unification Theory
		In Newton's theory of gravitation, time and space are separate and do not have the close relation they have in special relativity.
		In 1916 Einstein revised the theory of gravitation and proposed the general theory of relativity.
		Electric charge is the property attributed to a particle that responds to the electromagnetic force, and the amount of the charge determines the response as stated in the Coulomb's law.
	www.irfi.org /articles/articles_51_100/grand_unification_theory.htm (2010 words)

	intron origin theory (Site not responding. Last check: 2007-10-23)
		Although Euglena gracilis is a single cell protist, a primitive form of eukaryotes, it has an intron content even higher than some land plants.
		This theory, in a broader sense might also apply to the general evolution of chloroplast introns.
		The chloroplast genome of genus Euglena arose from an intron-less common ancestor.
	users.sisna.com /liqun/main2.htm (308 words)

	What is Darwinism?
		The selected theories are by no means all of Darwin's evolutionary theories; others were, for instance, sexual selection, pangenesis, effect of use and disuse, and character divergence.
		This is the theory that the world is not constant or recently created nor perpetually cycling, but rather is steadily changing, and that organisms are transformed in time.
		This is the theory that every group of organisms descended from a common ancestor, and that all groups of organisms, including animals, plants, and microorganisms, ultimately go back to a single origin of life on earth.
	www.talkorigins.org /faqs/darwinism.html (1288 words)

	Encyclopedia: Single-origin hypothesis (Site not responding. Last check: 2007-10-23)
		The multiregional origin hypothesis of human origins holds that some, or all, of the genetic variation between the contemporary human races is attributable to genetic inheritance from hominid species, or subspecies, that were geographically dispersed throughout Asia, and possibly Europe and Australasia, prior to the evolution of modern Homo sapiens...
		The Hybrid-origin hypothesis of human origins argues that all of the genetic variation between the contemporary human races is attributable to genetic inheritance from two widely divergent hominid species, or subspecies, that were geographically dispersed throughout Africa, Southeast_Asia and possibly the Indian_subcontinent, prior to the evolution of modern Homo...
		Born 1947, Chris Stringer is a British anthropologist and one of the leading proponents of the Single-origin theory, which hypothesizes that modern humans originated in East Africa approximately 100,000 years B.P. and replaced the worlds archaic human species, such as Homo erectus and Neandertals, after migrating...
	www.nationmaster.com /encyclopedia/Single_origin-hypothesis (1474 words)

	Evolution Is Impossible (Site not responding. Last check: 2007-10-23)
		The theory of evolution, which claims that life emerged as a result of chance, is quite helpless in the face of this order, since it is too wondrous to be explained by coincidence.
		Robert Shapiro, a professor of chemistry at New York University and a DNA expert, calculated the probability of the coincidental formation of the 2000 types of proteins found in a single bacterium (There are 200,000 different types of proteins in a human cell.) The number that was found was 1 over 10 40000.
		Indeed, such a theory (that life was assembled by an intelligence) is so obvious that one wonders why it is not widely accepted as being self-evident.
	www.evolutionisimpossible.com /chemistry.html (1999 words)

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