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1 Did life begin . on land?
- Author: universityofcalifornia.edu
- Published Date: 11/07/2021
- Review: 4.97 (853 vote)
- Summary: · Scientists who believed life began in the ocean thought these mineral formations had formed in shallow, salty seawater, just like living
- Matching search results: For Damer, the new “end-to-end hypothesis” of how life began on land offers something else: that the origin of life was not just a simple story of individual, competing cells. Rather that a plausible new vision of life’s start could be a communal …
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2 The Origin of Life | American Scientist
- Author: americanscientist.org
- Published Date: 10/21/2021
- Review: 4.63 (399 vote)
- Summary: Yet one of the most obvious big questions—how did life arise from inorganic … in origin-of-life studies began in a basement laboratory in the chemistry
- Matching search results: Networks of synthetic pathways that are recursive and self-catalyzing are widely known in organic chemistry, but they are notorious for generating a mass of side products, which may disrupt the reaction system or simply dilute the reactants, …
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3 Did Life Start by Accident? The Missing Pieces
- Author: aish.com
- Published Date: 08/14/2022
- Review: 4.47 (500 vote)
- Summary: · Scientists posit that the Universe initially contained no life. Through some set of circumstances, life generated spontaneously with a single
- Matching search results: So that brings us up to date. Over 50 years of intense scientific research has led to a few sparse examples of the possible accidental creation of small quantities of some very simple building blocks, each of which have no more than 20 atoms. Just …
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4 How Did Life Start On Earth?
- Author: lco.global
- Published Date: 06/13/2022
- Review: 4.36 (231 vote)
- Summary: Scientists do not know how life began on Earth, but they do know that the early Earth’s atmosphere was very different from the atmosphere now
- Matching search results: Astrobiologists and biochemists want to understand something they call LUCA (the Last Universal Common Ancestor). The idea is that all life on Earth has a common ancestor, kind of like a great-great-great-….-great grandmother. They search for …
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5 Where on Earth Did Life Originate?
- Author: science.thewire.in
- Published Date: 10/30/2021
- Review: 4.17 (409 vote)
- Summary: · Some of the oldest evidence for life on Earth comes from ancient chemical signatures and fossils in sedimentary rocks in Canada, which likely
- Matching search results: Lane used a laboratory replica of ancient deep-sea conditions to determine whether lipid-surrounded bubbles called vesicles — a sort of protocell — could form there. His team added 14 fatty acids and other chemicals, which would likely have been …
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6 Did Life Start More Than Once on Earth?
- Author: astrobiology.com
- Published Date: 04/20/2022
- Review: 3.8 (482 vote)
- Summary: · Conditions suitable to support complex life may have developed in Earth’s oceans — and then faded — more than a billion years before life
- Matching search results: The oxygen’s persistence over a long stretch of time is an important factor, Kipp stressed: “Whereas before and after maybe there were transient environments that could have occasionally supported these organisms, to get them to evolve and be a …
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7 The origin of life: The conditions that sparked life on Earth
- Author: researchoutreach.org
- Published Date: 03/18/2022
- Review: 3.71 (234 vote)
- Summary: · Discovering the answer as to how the very first life began on Earth … However, these organic molecules did not naturally exist on Earth
- Matching search results: Requirements for early life We know that all the key elements for life are found on Earth, but they do not easily form organic compounds. Early experiments during the 1950s showed that it was possible for amino acids to form in water condensation …
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8 How did life begin? – New Scientist
- Author: newscientist.com
- Published Date: 07/20/2022
- Review: 3.49 (509 vote)
- Summary: Others think life began in ponds on land, perhaps geothermal pools like those in Yellowstone. Many other locations have been proposed, such as ice. A minority
- Matching search results: The RNA World has amassed a lot of supporting evidence, but it is not clear that RNA alone was enough. In recent years, some researchers have suggested that RNA only really reaches its potential when it is paired with proteins – and that both must …
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9 How Did Life Begin? – Universe Today
- Author: universetoday.com
- Published Date: 12/06/2021
- Review: 3.33 (493 vote)
- Summary: · The Earth has been around for 4.5 billion years, and those early years were completely hostile to life. The early atmosphere was toxic, and a
- Matching search results: One of the first clues is amino acids, the building blocks of life. In 1953, Stanley Miller and Harold Urey demonstrated that amino acids could form naturally in the environment of the early Earth. They replicated the atmosphere and chemicals …
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10 How Did Life Begin? | Beta site for NSF – National Science Foundation
- Author: beta.nsf.gov
- Published Date: 11/25/2021
- Review: 3.05 (400 vote)
- Summary: · Many scientists believe that RNA, or something similar to RNA, was the first molecule on Earth to self-replicate and begin the process of
- Matching search results: Chemist Nicholas Hud has been working on this problem at the Georgia Institute of Technology for more than a decade. He and his students have discovered that small molecules could have acted as “molecular midwives” in helping the building blocks of …
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11 A new finding raises an old question: Where and when did life begin?
- Author: popsci.com
- Published Date: 11/04/2021
- Review: 2.86 (93 vote)
- Summary: · Biologists tend to prefer the sea theory, which posits that life began at deep-sea hydrothermal vents, where super-heated, mineral-charged
- Matching search results: Canadian geologist Dominic Papineau schemed for years to visit this lonely place, known as the Nuvvuagittuq Supracrustal Belt. In 2008, he finally rounded up a couple thousand dollars in funding and set out from the Carnegie Institution for Science …
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12 How Did Life Begin? – Common Question – BioLogos
- Author: biologos.org
- Published Date: 01/27/2022
- Review: 2.77 (64 vote)
- Summary: · Evolutionary theories of how life originated fall in two main camps: the gene first hypothesis and the metabolism first hypothesis. The gene
- Matching search results: While researchers have recently generated self-replicating RNA from prebiotic molecules in the laboratory,16 it is difficult to understand how RNA—a notoriously unstable polymer—could have supported self-replicating systems in the hostile chemical …
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13 How to Build Life in a Pre-Darwinian World
- Author: quantamagazine.org
- Published Date: 12/26/2021
- Review: 2.72 (180 vote)
- Summary: · How did life’s myriad parts come together? … “Chemical evolution could have helped life get started without enzymes,” Hud said
- Matching search results: In this scenario, a variety of RNA-like molecules could form spontaneously, helping the chemical pool to simultaneously invent many of the parts needed for life to emerge. Proto-life forms experimented with primitive molecular machinery, sharing …
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14 7 theories on the origin of life
- Author: livescience.com
- Published Date: 06/19/2022
- Review: 2.61 (192 vote)
- Summary: Life began at deep-sea vents The deep-sea vent theory suggests that life may have begun at submarine hydrothermal vents spewing elements key to life, such as carbon and hydrogen-, according to the journal Nature Reviews Microbiology (opens in new tab)
- Matching search results: Ice might have covered the oceans 3 billion years ago and facilitated the birth of life. “Key organic compounds thought to be important in the origin of life are more stable at lower temperatures,” Jeffrey Bada at the University of California, told …
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15 When did life begin? – Science Features – ABC
- Author: abc.net.au
- Published Date: 03/07/2022
- Review: 2.48 (63 vote)
- Summary: · Until recently, life on Earth was said to have begun 3.5 billion years ago, a date originally based on curvaceous, worm-like strings of
- Matching search results: Walter, director of the Australian Centre for Astrobiology at the University of New South Wales, has worked for more than 40 years on the geological evidence of early life. He was one of the first scientists in the early 1990s to push life back as …
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