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Topic: Life on Earth

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	Life on Earth - Wikipedia, the free encyclopedia
		Life on Earth: A Natural History by David Attenborough (1979) is a groundbreaking 13-part television natural history series made by the BBC in association with Warner Bros. and Reiner Moritz Productions.
		The most famous sequence in the series occurs in the 12th episode in which Attenborough allows himself to be groomed by a group of mountain gorillas in Rwanda.
		Attenborough himself was bemused by the iconic status that this television moment acquired, and subsequently appeared in a television commercial for after-dinner mints parodying the conventions of wild life documentaries.
	en.wikipedia.org /wiki/Life_on_Earth (385 words)

	Life on Earth and Elsewhere
		The presence of Homo sapiens sapiens is evident from night-time observations of Earth's surface.
		One view of the Phylogeny of Life on Earth (at the University of California at Berkeley's Museum of Paleontology) highlights the role of archeabacteria among prokaryotes -- as a separate Archaea "domain" apart from Eubacteria -- in the development of cellular life with nuclei (eukaryotes).
		As a result, life on Earth has flourished for over four billion years by recycling its own wastes and exploiting new habitats with physiological adaptations, through occasional environmental disasters such as catastrophic meteoric impacts.
	www.solstation.com /life.htm (2717 words)

	Life on Earth (Site not responding. Last check: 2007-10-20)
		Life on Earth: A Natural History by Attenborough (1979) is a groundbreaking 13-part television natural history series made by the BBC in association with Warner Bros. and Reiner Moritz Productions.
		The most famous sequence in the series in the 12th episode in which Attenborough himself to be groomed by a group mountain gorillas in Rwanda.
		Attenborough himself was bemused by the status that this television moment acquired and appeared in a television commercial for after-dinner parodying the conventions of wild life documentaries.
	www.freeglossary.com /Life_on_Earth (820 words)

	The Atmosphere
		The Earth is surrounded by a blanket of air, which we call the atmosphere.
		It reaches over 560 kilometers (348 miles) from the surface of the Earth, so we are only able to see what occurs fairly close to the ground.
		Life on Earth is supported by the atmosphere, solar energy, and our planet's magnetic fields.
	liftoff.msfc.nasa.gov /academy/space/atmosphere.html (568 words)

	Life on Earth (Site not responding. Last check: 2007-10-20)
		The result is a pageant of life - a re-enactment of 3,500 million years of history with a cast of characters drawn from the whole range of life on earth today.
		The book's thirteen chapters cover all the major events in the evolution of life: the first multi-celled creatures; the move from sea to land, and from land to air; the development of warmblooded animals- and the evolution of man himself.
		Finally, man himself is examined, both as an integral part of life on earth, and as the species whose unique cultural evolution has made him responsible for the future of all living things.
	www.bbcfactual.co.uk /life_on_earth.htm (974 words)

	Life on Earth - flow of Energy and Entropy
		Limiting the Earth's population and lowering individual consumption of energy and negative entropy is essential for the survival of the Biosphere.
		Life on Earth is organized in the form of a pyramid of interdependence (Fig.4).
		Their life span was optimized during evolution to insure survival of a species in a particular niche of the ecosystem.
	www.digital-recordings.com /publ/publife.html (3262 words)

	Life on Earth -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-20)
		For the article on Earth's Life see (The period during which something is functional (as between birth and death)) Life
		There was an accompanying book, and the series is available on (A digital videodisc; a recording (as of a movie) on an optical disk that can be played on a computer or a television set) DVD.
		The most famous sequence in the series occurs in the 12th episode in which Attenborough allows himself to be groomed by a group of mountain (Largest anthropoid ape; terrestrial and vegetarian; of forests of central west Africa) gorillas in (A landlocked republic in central Africa; formerly a German colony) Rwanda.
	www.absoluteastronomy.com /encyclopedia/l/li/life_on_earth.htm (407 words)

	Origins of Life
		Life is tenacious, and it completely permeates the surface layer of the planet.
		Some suggest that perhaps life is endemic to the universe: note the presence of complex carbon compounds in interstellar space and on comets and meteors.
		DNA and RNA are apparantly the 'universal' basis for all life on Earth.
	www.resa.net /nasa/origins_life.htm (2600 words)

	American Scientist Online - The Beginnings of Life on Earth (Site not responding. Last check: 2007-10-20)
		Hence suggestions were made that germs of life may have come to earth from outer space with cometary dust or even, as proposed by Francis Crick of DNA double-helix fame, on a spaceship sent out by some distant civilization.
		It is now generally agreed that if life arose spontaneously by natural processes—a necessary assumption if we wish to remain within the realm of science—it must have arisen fairly quickly, more in a matter of millennia or centuries, perhaps even less, than in millions of years.
		The history of life on earth is written in the cells and molecules of existing organisms.
	www.americanscientist.org /template/AssetDetail/assetid/21438?fulltext=true (440 words)

	BBC Evolution Weekend: Life on Earth (Site not responding. Last check: 2007-10-20)
		Horseshoe crabs have changed little for several hundred million years and are relics of the huge variety of segmented creatures that once swarmed in the seas and among whom were the first invaders of land.
		By the time the first insects were flying, the plant life on earth had undergone dramatic changes.
		But by then different forms of life, with bodies built on a radically different plan had emerged in the seas, and it's they that we'll be looking at in the next programme.
	www.bbc.co.uk /education/darwin/loe/loe1.htm (4579 words)

	Titan and the Origin of Life on Earth
		The mystery of the origin of life on Earth will never be solved if our studies are confined to our own planet.
		Life originated sometime during the first billion years of Earth's history, perhaps more than once, from a subtle pre-biotic chemistry involving two key ingredients: carbon-based molecules and liquid water.
		If the volatile elements we now find in Earth's atmosphere were originally delivered by comets, as some scientists believe, we might expect the elemental composition of Titan's atmosphere to be similar to the atmosphere of the early Earth.
	esapub.esrin.esa.it /bulletin/bullet92/b92owen.htm (1633 words)

	Life On Earth DVD (Site not responding. Last check: 2007-10-20)
		Life on Earth (1979) is an epic 13-programme series, presented by David Attenborough, offering a chronological account of the flora and fauna of planet Earth over a period of 3,500 million years.
		Three years in the making, involving 1.5 million miles of travel and featuring some of the most beautiful, breathtaking and ambitious photography then seen on television, Life on Earth was the first natural history blockbuster.
		On the DVD: Life on Earth is presented complete in this DVD box set, with a total running time of 715 minutes (13 x 55 minutes).
	www.uk-shop-index.co.uk /films/Life-On-Earth.html (277 words)

	[No title]
		Biological diversity - or biodiversity - is the term given to the variety of life on Earth and the natural patterns it forms.
		It forms the web of life of which we are an integral part and upon which we so fully depend.
		It is the combination of life forms and their interactions with each other and with the rest of the environment that has made Earth a uniquely habitable place for humans.
	www.biodiv.org /doc/publications/guide.asp (403 words)

	Origin of Life on Earth (Overview)
		Though no one is ever likely to know the whole story, virtually everyone has wondered at one time or another, how life on Earth began.
		There are at least three types of hypotheses which attempt to explain the origin of life on Earth.
		The third, and most common hypothesis in the scientific community, is that life began approximately 3.5 billion years ago as the result of a complex sequence of chemical reactions that took place spontaneously in Earth's atmosphere.
	www.windows.ucar.edu /tour/link=/life/origins.html (275 words)

	The Origin of Life on Earth :: Astrobiology Magazine :: Search for Life in the Universe
		Of all the predictions that we can make about life on other worlds, the surest seems to be that their life will be made of elements nearly the same as those used by life on Earth.
		If life on our planet consisted primarily of four extremely rare elements in the cosmos, such as niobium, bismuth, gallium, and plutonium, we would have an excellent reason to suspect we represent something special in the universe.
		When we look into Earth's oceans, which are almost entirely hydrogen and oxygen, it is surprising that life lists carbon and nitrogen among its most abundant elements, rather than chlorine, sodium, sulfur, calcium, or potassium, which are the most common elements dissolved in seawater.
	www.astrobio.net /news/article1319.html (950 words)

	Life on Earth (Site not responding. Last check: 2007-10-20)
		It's everywhere on Earth; you can find living organisms from the poles to the equator, from the bottom of the sea to several miles in the air, from freezing waters to dry valleys to undersea thermal vents to groundwater thousands of feet below the Earth's surface.
		In the 19th century, evidence began to accumulate that these were insufficient to express the diversity of life, and various schemes were proposed with three, four, or more kingdoms.
		This coexisted with a scheme dividing life into two main divisions: the Prokaryotae (bacteria, etc.) and the Eukaryotae (animals, plants, fungi, and protists).
	www.ucmp.berkeley.edu /alllife/threedomains.html (457 words)

	Living on Earth: Sound Journalism for the Whole Planet
		Major funding for Living On Earth is provided by the National Science Foundation.
		Living on Earth talks with residents about their dreams and fears of what may lie ahead for New Orleans.
		LOE travels to Iceland, a country whose goal is to convert all buses, cars, and boats to use hydrogen instead of fossil fuels.
	www.loe.org (356 words)

	Declaration for All Life on Earth
		Every form of life on earth is an important part of this living entity.
		Accordingly, we, as individual human beings, must cultivate the awareness that we are all members of a global community of life and that we share a common mission and responsibility for the future of our planet.
		In the new era, humanity shall advance toward a world of harmony, that is, a world in which every individual and every nation can freely express their individual qualities, while living in harmony with one another and with all life on earth.
	www.worldpeace.org /declaration.html (713 words)

	Origins of Life on Earth
		And other scientists are trying to detect life in other solar systems, either by measuring life's effects on the atmospheres of distant planets or by measuring artificial radiation like radio signals that may be produced by advanced life.
		We know that life began at least 3.5 billion years ago, because that is the age of the oldest rocks with fossil evidence of life on earth.
		Currently, life is being sought on Mars where water may have once flowed on the surface and Europa where a subterranean sea of water may exist beneath its icy surface.
	www.lpl.arizona.edu /SIC/impact_cratering/origin_of_life/Origins_Life (725 words)

	Resource: Unseen Life on Earth: An Introduction to Microbiology (Site not responding. Last check: 2007-10-20)
		Unseen Life on Earth is designed for general microbiology courses for majors and allied health students.
		Although living organisms have diverse ways of meeting their energy needs, there is an amazing similarity between all life forms as they carry out metabolism directed to the construction and use of necessary biological molecules.
		Humans and all life forms depend on microorganisms as the essential processors of oxygen, mineral nutrients for plant growth, and waste materials.
	www.learner.org /resources/series121.html (621 words)

	Could life on Earth have started on Mars? (Site not responding. Last check: 2007-10-20)
		The most primitive life we have identified on Earth, the archeobacteria, include bacteria that cannot live in an oxygen atmosphere and that use methane to produce energy.
		It is also possible that if there is any life on Mars, it could have gotten there from Earth by the same meteoritic impact and hitch hiking process.
		Some scientists still think it is possible that much of the organic processing that led to life on Earth happened off-Earth, and this could include even the partial assembly of DNA material, although I find this hard to believe.
	www.astronomycafe.net /qadir/q2150.html (212 words)

	Origin of Life on Earth by Leslie E. Orgel
		Miller found that as much as 10 percent of the carbon in the system was converted to a relatively small number of identifiable organic compounds, and up to 2 percent of the carbon went to making amino acids of the kinds that serve as constituents of proteins.
		For instance, the amino acids and nitrogen-containing bases needed for life on the earth might have been delivered by interstellar dust, meteorites and comets.
		During the first half a billion years of the earth's history, bombardment by meteorites and comets must have been intense, although the extent to which organic material could have survived such impacts is debatable.
	www.geocities.com /CapeCanaveral/Lab/2948/orgel.html (5055 words)

	Earliest Known Life on Earth (Site not responding. Last check: 2007-10-20)
		Evidence of the earliest known life on Earth has been discovered in rock analysed by a team including a geologist from Oxford Brookes University, the journal Nature revealed in its November 7 issue.
		Dr Friend is a lecturer in the Geology and Cartography Division of the School of Construction and Earth Sciences at Oxford Brookes University.
		The paper "Evidence for Life on Earth before 3800 million years ago" is by S. J Mojzsis, G. Arrhenius, K.D. McKeegan, T.M. Harrison, A.P. Nutman and C.R.L. Friend.
	www.brookes.ac.uk /geology/rock.html (612 words)

	Life on Earth (Site not responding. Last check: 2007-10-20)
		In this model, the earliest and most basic life forms are the Archaea: relatively simple, mostly chemautotrophic single-celled organisms.
		Because we are vertebrates, this group has always had a special place, and we refer to all non-vertebrate metazoans as "invertebrates." We will retain this bit of phylogenetic chauvinism in Palaeos for some organizational purposes, until we hear objections from any brachiopods or priapulid worms who might have occasion to offer their comments.
		Cladograms, or "trees of life," are appropriate phylogenetic schemes for metazoans (multi-celled eukaryotes) but sometimes misleading in other organisms.
	www.palaeos.com /Kingdoms (971 words)

	Stepan Chapman Life on Earth Reviewed by Rick Kleffel (Site not responding. Last check: 2007-10-20)
		'Life on Earth' is an apocalyptic parable, Doctor Seuss channeling Stanislaw Lem.
		Put simply, 'Life on Earth' is the adventures of 'Life on Earth', which is treated as a character with multitudinous, ungainly forms.
		'Life on Earth' is not going to be easy to find, but it's worth the search.
	trashotron.com /agony/reviews/2004/chapman-life_on_earth.htm (410 words)

	SPACE.com -- New Case for Oldest Life on Earth (Site not responding. Last check: 2007-10-20)
		Using a method never applied to rock from ancient Earth, researchers have found possible signs of biological activity dating back nearly 3.5 billion years, earlier than any other agreed-upon discovery of life on this planet.
		If the terrestrial finding is confirmed, it means life was thriving not long after this world had been presumably sterilized several times over by asteroid and comet impacts that were common in the earliest era of the solar system, which is about 4.6 billion years old.
		They do know that Earth was initially inhospitable and probably dry as a bone when it formed about 4.5 billion years ago.
	www.space.com /scienceastronomy/lava_life_040422.html (958 words)

	Exploratour - Life on Earth, page 1
		This tour is a detailed look at life on Earth, and what we know about how it came to be.
		The study of life is called "biology" and the people who study it are "biologists".
		They even have a tough time describing what life is! But after many years of studying living things, from the mold on your old tuna sandwich to monkeys in the rainforest, biologists have determined that all living things, do share some things in common:
	www.windows.ucar.edu /tour/cool_stuff/tour_life_earth_1.html (228 words)

	Life on Earth (Site not responding. Last check: 2007-10-20)
		If an alien accidentally misses the secret headquarters of Earth's ruling cabal and lands on your front doorstep, bear in mind that tea and scones could be absolutely poisonous to their digestive system.
		There are few problems in life that cannot be solved by the liberal application of toasted cheese sandwiches and vodka, with the possible exception of the aftermath of too much toasted cheese sandwiches and vodka.
		This will come in handy in later life when you bet someone you can drink two liters and not throw up for half an hour, and they video tape it, but you make it, so the tape just has you drinking milk and sitting there.
	www.vital.org.nz /loe/3.html (6521 words)

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