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Topic: Panspermia

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	Panspermia - Wikipedia, the free encyclopedia
		Panspermia is the hypothesis that the seeds of life are ubiquitous in the Universe, that they may have delivered life to Earth, and that they may deliver or have delivered life to other habitable bodies; also the process of such delivery.
		The first known mention of the idea was in the writings of the 5th century BCE Greek philosopher Anaxagoras, but panspermia theory was dormant until the nineteenth century when it was revived in modern form by several scientists, including Hermann von Helmholtz in 1879.
		That these are common terrestrial organisms is not necessarily contraindicative of panspermia, since a prediction of the hypothesis is that life throughout the Universe is derived from the same ancestral stock.
	en.wikipedia.org /wiki/Panspermia (3887 words)

	Talk:Panspermia - Wikipedia, the free encyclopedia
		Rather panspermia is the hypothesis that the building blocks of life are common and uniform throughout space and that they take root when they land on a planet with suitable conditions.
		Panspermia is quite often refered to as a theory and it is testable.
		Panspermia and directed panspermia are really subclasses, and I would have thought that exogenesis as a whole would include other theories of the origin of life being somewhere other than Earth.
	en.wikipedia.org /wiki/Talk:Panspermia (3612 words)

	Panspermia (Site not responding. Last check: 2007-11-06)
		Actually, Panspermia is as irrelevant as to play a role in the origin of life on Earth.
		Panspermia is so adhered to scientific method as creationism (I am not refuting God's existence, which is a different issue more in line with philosophy): both tales lack in affection to pragmatism.
		Given that panspermia does not maintain a feasible questioning, and it has not sources based on events that could be given to scientific assessment, neither observation of repeatable facts, and given that panspermia describes a very invented process, it does not rank as a hypothesis, a theory, neither a scientific law.
	www.biocab.org /Panspermia.html (3132 words)

	The Debate of Panspermia: Are We the Descendents of Aliens?
		Panspermia is the theory tha stuff of life is everywhere and that we humans owe our genesis and evolution to a continual rain of foreign microbes.
		Weak panspermia is the theory that organic compounds arrived from outer space and added to the nutrient broth that spawned the first life.
		The second type of panspermia is called basic panspermia and can be defined as the presence of microbial life in space or on bodies such as comets or meteors that then reach a planet and start life on that planet.
	serendip.brynmawr.edu /biology/b103/f01/web1/baird.html (1869 words)

	A panspermic view of life
		(Panspermia, which literally means seeds everywhere, underlies the hypothesis that the (biological) stuff of life did not have its origins in terrestrial resources but in inter-stellar space.
		They attribute the failure on the part of most of the scientists to recognise clear evidences for panspermia to the early indoctrination in Darwin ism on the one hand and the Christian beliefs in creationism on the other.
		Indeed, some say that even the theory of panspermia would require "deliberate intervention" of some sort and in that respect it is no different from cr eationism.
	www.flonnet.com /fl1725/17250800.htm (2295 words)

	Astrobiology: The Living Universe - An Interview with Brig Klyce
		Along with the theory of evolution, panspermia is a theory that explains the presence and diversity of life on Earth.
		My own addition is to marry panspermia with Gaia (which match holds little interest for Hoyle and Wickramasinghe or Lovelock.) That is, germs from space colonize a planet and engineer it to be suitable for higher life forms.
		Klyce: Several of the predictions of panspermia have been upheld in the past 25 years such as complex organic compounds in space, life's rapid start on Earth, punctuated equilibrium in evolution, and the importance of horizontal gene transfer in evolution.
	www.ibiblio.org /astrobiology/index.php?page=interview10 (594 words)

	Star Larvae: Panspermia
		The growing body of evidence for Hoyle’s version of panspermia theory is archived and regularly updated by advocate Brig Klyce at www.panspermia.org.
		Panspermia is a one-way street in his view, with no apparent role for complex, multicellular life other than to host bacteria and viruses.
		The hypothesis incorporates panspermia, which it takes to be the critical process in the stellar life cycle that delivers biological building blocks—bacterial life—and genetic sorters—viruses—to planets.
	www.starlarvae.org /Star_Larvae_Panspermia.html (1006 words)

	Origin of Life - Panspermia (Site not responding. Last check: 2007-11-06)
		Panspermia is the theory that life is ubiquitous in the universe, and that planetary life most frequently arises from seeds from previous living organisms.
		Panspermia is a theory of the origin of life on Earth.
		However, from the perspective of most abiogenesis theorists, panspermia is an inconvenience - since it casts doubt on what little information we do know about the conditions of the first living organisms - and destroys any chance that fossils from near the event might remain.
	originoflife.net /panspermia (141 words)

	Panspermia (Site not responding. Last check: 2007-11-06)
		However, a consequence of panspermia is that life throughout the universe would have a surprisingly similar biochemistry, being derived from the same ancestral stock.
		Another objection to Panspermia is that bacteria would not survive the immense heat and forces of an impact on earth; no conclusions (whether positive or negative) have yet been reached on this point.
		Some believers in panspermia, however, believe that life never evolved from inorganic molecules, but that it has existed as long as all other forms of matter.
	www.aaaah.org /wiki/en/pa/Panspermia.htm (929 words)

	Astrobiology: The Living Universe - Panspermia
		Panspermia is a theory that states that the Earth was 'seeded' with life when celestial objects collided with the Earth.
		The theory of panspermia gained even more support with the announcement during the summer of 1996 that scientists at NASA had discovered evidence for primitive Martian life on a meteorite from Mars.
		Panspermia doesn’t explain the origin of life itself, but the proliferation of life through the universe.
	www.ibiblio.org /astrobiology/index.php?page=origin08 (774 words)

	Plausibility, Significance and Panspermia
		Panspermia as a concept is not intrinsically implausible, but in science it has played a minor, inglorious role to date and its inglory is not on the wane; not to my eye anyway.
		Panspermia as a term in any case bears the implication of the effectively universal presence of life, whereas astrobiology as a term implies no such thing.
		This version of Panspermia is the main playground of the purveyors of cosmic sources of diseases, for example, and that would peg the lower limit of ambient life at a frequency related to the frequency of new plagues on Earth.
	abob.libs.uga.edu /bobk/ccc/ce120600.html (13900 words)

	Problems with Panspermia or Extraterrestrial Origin of Life Scenarios
		One location that has inspired hope in panspermia for some exobiologists (biologists who study extra-terrestrial life) is Jupiter's moon, Europa, which appears to have ice-caps on its surface which they hope could be the cover for a sub-surface ocean.
		Crick basically proposed directed panspermia because he looked at the state of origin of life theories on earth, and determined that it was highly unlikely that life could have originated naturally on earth.
		If one accepts that life on earth was designed, the problem with this theory is that although it might explain the design of life on earth, it cannot explain the design of extra-terrestrial components of the universe which are crucial to our existence.
	www.ideacenter.org /contentmgr/showdetails.php/id/849 (2174 words)

	Panspermia - Society for Life in Space (SOLIS).
		Natural panspermia has been proposed by prominent scientists: Lord Kelvin (1880's), Svante Arrhenius (1906), and Hoyle and Wickramasinge (1970's to present), and it is considered seriously by astrobiologists.
		Directed panspermia was mentioned by Shklovskii and Sagan (1966) and Orgel and Crick (1973).
		The Panspermia Society (SOLIS) was formed in 1995 to develop this program.
	www.panspermia-society.com (693 words)

	Cometary Impacts and the Origins of Life on Earth
		Arrhenius suggested that microbes could be hurled into near-planetary space by storms, and travel from planet to planet by radiation pressure (that is, comets or meteorites were not needed for transportation).
		Arrhenius is often credited with originating the idea of panspermia, although earlier scientists like William Thomson (Lord Kelvin) had already advanced the idea that life on Earth was seeded by meteorites.
		Panspermia Theory Supported by New Report discusses the finding of buckyballs -- arrays of carbon atoms shaped like the geodesic domes created by architect R. Buckminter Fuller -- in the impact crater at Sudbury, Ontario.
	www.pibburns.com /catastro/pansperm.htm (695 words)

	biology - Panspermia
		Panspermia is a hypothesis that the seeds of life are prevalent throughout the Universe, and furthermore that life on Earth began by such seeds landing on Earth and propagating.
		Hoyle's advocacy is both a blessing and a curse: although he was a highly original thinker and won top scientific accolades, some of his principal ideas (such as steady state theory) have been largely shown to be false.
		Whilst the perpetrator of this hoax is unknown, it is thought he sought to influence the 19th century debate on spontaneous generation - rather than panspermia - by demonstrating the transformation of inorganic to biological matter.
	www.biologydaily.com /biology/Panspermia (2909 words)

	Problems with Panspermia...from the IDEA Club (Site not responding. Last check: 2007-11-06)
		Panspermia is the theory that microorganisms or biochemical compounds from outer space are responsible for originating life on Earth and possibly in other parts of the universe where suitable atmospheric conditions exist.
		Crick basically proposed directed panspermia because he looked at the state of origins of life theories on earth, and determined that it was highly unlikely that life could have originated naturally on earth.
		Additionally, asserting that extra-terrestrials designed life on earth only pushes back the question, "where did the extra-terrestrials come from?" While they may have been designed, or may have evolved, at some point it would be scientifically and philosophically satisfying to determine the ultimate origin of life in the uinverse.
	acs.ucsd.edu /~idea/badpansperm.htm (2038 words)

	Panspermia
		Panspermia is the theory that microbes in space bring life to planets like Earth, or the process whereby this happens.
		In different versions of the theory, the microbes are transported by light pressure (Arrhenius's radio-panspermia), unmanned spaceships (Crick's directed panspermia), meteorites (ballistic panspermia), or comets (Hoyle and Wickramasinghe's modern panspermia).
		More controversial is the strong version of panspermia, holding that not only life's emergence, but also its evolution to higher forms, depends on biological material from space.
	www.iscid.org /encyclopedia/Panspermia (227 words)

	Panspermia
		Panspermia gives a reasonable explanation of the spread of illnesses as the flu that have to do with respiratory organs.
		Panspermia cannot be reconciled with this theory and neither with creationist theories which all start with a revolution in the far past (the organic soup or the Creation) and continue with gradual changes.
		Panspermia can be the start of an explanation of the uniqueness of human consciousness, intelligence and creativity that is hardly present in lower life forms.
	members.chello.nl /jsteenis/scarists12.htm (4850 words)

	sciforums.com - Life from Space - Panspermia...
		Basic panspermia is the presence in space, or on bodies like comets or asteroids, of microbial life that can be safely delivered to planets and start life there.
		Strong panspermia is the extension of modern panspermia to deal with evolution as well.
		In strong panspermia, the genes for evolutionary advances are not written by copying mistakes and reshuffling within an original set of bacterial genes.
	www.sciforums.com /showthread.php?t=5758 (3206 words)

	Wikinfo \| Panspermia
		In John Wyndham's book, The Day of the Triffids, the first person narrator, writing in historical mode, takes care to reject the theory of panspermia in favour of the conclusion that the eponymous carnivorous plants are a product of Soviet biotechnology.
		Some works of science fiction advance a derivative of the theory as a rationalisation for the improbable tendency of fictional extra-terrestrials to be strongly humanoid in form as well as living on earth-compatible worlds (see Class M planet).
		Images, some of which are used under the doctrine of Fair use or used with permission, may not be available.
	www.wikinfo.org /wiki.php?title=Panspermia (1038 words)

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