The very thing that we've removed." [154][155] Life forms appear to thrive in the Mariana Trench, the deepest spot in the Earth's oceans. Fresh Water . Attenborough cites government intervention in Costa Rica causing deforestation to reverse, Palau's fishing regulations and improved use of land in the Netherlands as good examples. It was decisively dispelled by the experiments of Louis Pasteur in 1859, who expanded upon the investigations of predecessors such as Francesco Redi. ", "Researchers find that Earth may be home to 1 trillion species", "There Might Be 1 Trillion Species on Earth", "Meet Luca, the Ancestor of All Living Things", "Modelling biological complexity: a physical scientist's perspective", "How RNA Got Started: Scientists Look for the Origins of Life", "A model for the RNA-catalyzed replication of RNA", "Evidence for reactive reduced phosphorus species in the early Archean ocean", "Self-Sustained Replication of an RNA Enzyme", "Carbonaceous meteorites contain a wide range of extraterrestrial nucleobases", "NASA Researchers: DNA Building Blocks Can Be Made in Space", "DNA Building Blocks Can Be Made in Space, NASA Evidence Suggests", "NASA Ames Reproduces the Building Blocks of Life in Laboratory", "Panspermia: A Promising Field Of Research", "Harvard study suggests asteroids might play key role in spreading life", "Understand the evolutionary mechanisms and environmental limits of life", "Browse online books, journals, magazines and newspapers by topic or by publication | Online Research Library: Questia", "First-Ever Scientific Estimate Of Total Bacteria On Earth Shows Far Greater Numbers Than Ever Known Before", "Life Might Thrive a Dozen Miles Beneath Earth's Surface", "The Strange Beasts That Live In Solid Rock Deep Underground", "Alarming Study Indicates Why Certain Bacteria Are More Resistant to Drugs in Space", "Space flight shown to alter ability of bacteria to cause disease", "Microbes Thrive in Deepest Spot on Earth", "Intraterrestrials: Life Thrives in Ocean Floor", "Microbes discovered by deepest marine drill analysed", "Lakes under the ice: Antarctica's secret garden", "Life Confirmed Under Antarctic Ice; Is Space Next? [148] By the most general biophysiological definition, the biosphere is the global ecological system integrating all living beings and their relationships, including their interaction with the elements of the lithosphere, geosphere, hydrosphere, and atmosphere. David.Attenborough.A.Life.on.our.Planet.1080p.HDTV.x264.AAC.MVGroup.org.mp4 (3329.10 Mb) Subtitles: [eng] It’s a haunting vision. The screenings website of David Attenborough: A Life on Our Planet film. His documentary career began in the 1950s when he began working for the BBC, a British public service broadcaster. [134], In 2009, experiments demonstrated Darwinian evolution of a two-component system of RNA enzymes (ribozymes) in vitro. [75], Some of the earliest theories of life were materialist, holding that all that exists is matter, and that life is merely a complex form or arrangement of matter. [197] The conventional model is that eukaryotes evolved from prokaryotes, with the main organelles of the eukaryotes forming through endosymbiosis between bacteria and the progenitor eukaryotic cell. Attenborough’s latest offering, A Life On Our Planet, is a reflective piece, looking back on his 94 years on Earth and sending a desperate appeal for help in securing its future. "[99], In a general sense, biospheres are any closed, self-regulating systems containing ecosystems. It can also be termed as the zone of life on Earth, a closed system (apart from solar and cosmic radiation and heat from the interior of the Earth), and largely self-regulating.

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