Posts Tagged Age of Earth

Origins of photosynthesis in plants dated to 1.25 billion years ago…

Intro:  The world’s oldest algae fossils are a billion years old, according to a new analysis… Read the article here at enn.com: http://www.enn.com/ecosystems/article/53513 Advertisements

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Oldest evidence of life on land found in 3.48 billion-year-old Australian rocks — ScienceDaily…

Research update from the University of New South Wales: https://www.sciencedaily.com/releases/2017/05/170509194434.htm

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‘Nesting doll’ minerals offer clues to Earth’s mantle dynamics: Rare sample discovered of the mineral majorite that originated at least 235 miles below Earth’s surface — ScienceDaily…

Some Geology news from ScienceDaily: https://www.sciencedaily.com/releases/2017/04/170407143313.htm

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The secret of how life on earth began… 

Article from bbc.com…  Summary: How did life begin? There can hardly be a bigger question. For much of human history, almost everyone believed some version of “the gods did it”. Any other explanation was inconceivable…  Read this article here: The secret of how life on earth began 

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2.5-Billion-Year-Old Fossils Predate Earth’s Oxygen… 

Fossils of what may be the oldest sulfur-eating bacteria ever found have been discovered in rocks dating back a staggering 2.52 billion years…  Check out this article at livescience.com: 2.5-Billion-Year-Old Fossils Predate Earth’s Oxygen

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Life in Earth’s soils may be older than believed… 

Summary:  Advanced imaging and analyses techniques have opened a new window into microfossils of ancient landscapes in Australia, report scientists…  From ScienceDaily.Com: Life in Earth’s soils may be older than believed

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Scientists uncover insights into the formation of Earth’s oldest continental crust…

Addressing fundamental unknowns about the earliest history of Earth’s crust, scientists have precisely dated the world’s oldest rock unit at 4.02 billion years old. The findings suggest that early Earth was largely covered with an oceanic crust-like surface. Source sciencedaily.com: Scientists uncover insights into the formation of Earth’s oldest continental crust Some other related articles […]

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Life on Earth likely started 4.1 billion years ago – Evidence that early Earth was not dry and desolate…

Source: sciencedaily.com: Life on Earth likely started 4.1 billion years ago, much earlier than scientists thought Geochemists have found probable evidence for life on Earth at least 4.1 billion years ago — 300 million years earlier than previously documented, pushing the origin of life close to when the planet formed, 4.54 billion years ago…

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Geological Time: The Paleozoic Era…

The Paleozoic Era, which ran from about 542 million years to 251 million years ago, encompassed much geomorphological and biological diversity change. The era is divided into six periods, the Cambrian, the Ordovician, the Silurian, the Devonian, the Carboniferous and the Permian. The following internet resources highlight information on this geological era: The Paleozoic Era (Wikipedia)… […]

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History of Life on Earth/Geological timeline/Geological time periods/etc….

from BBC Nature – bbc.co.uk… The Earth is a little over 4.5 billion years old, its oldest materials being 4.3 billion-year-old zircon crystals. Its earliest times were geologically violent, and it suffered constant bombardment from meteorites. When this ended, the Earth cooled and its surface solidified to a crust – the first solid rocks…. See […]

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Oxygen, phosphorus and early life on Earth…

“Two billion years ago Earth system was recovering from perhaps the single-most profound modification of its surface environments: the oxygenation of the atmosphere and oceans. This led to a series of major changes in global biogeochemical cycles…” Read the full entry at here ScienceDaily.com: Oxygen, phosphorus and early life on Earth.

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A look at Planet Earth and its environment…

“It’s fascinating to look at many of Earth’s characteristics and vital information all together in one place. It’s even more intriguing to have information about Earth’s beginnings, neighborhood and home galaxy in the same place. And in a kind of humorous way, it’s humbling to get a clearer perspective on where our place is in […]

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Climate puzzle over origins of life on Earth…

“The mystery of why life on Earth evolved when it did has deepened with the publication of a new study… scientists… have ruled out a theory as to why the planet was warm enough to sustain the planet’s earliest life forms when the Sun’s energy was roughly three-quarters the strength it is today… Life evolved […]

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Geological Time – The Geological Time Scale…

Proposed in 1913 by British geologist Arthur Holmes, the Geological Time Scale is a form of chronological measurement related to Earth’s stratigraphy and time which explains the timing of and relationships between the occurence of events in Earth’s physical history. A system called radiometric or radioactive dating has assisted in Earth’s age being estimated at […]

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