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Latest Great Oxygenation Event Stories

bacteria scoffs evolution
2015-02-03 12:27:00

Through the examination of tiny microscopic fossils, a large team of biologists has found that a community of deep-sea microbes hasn’t evolved at all in more than 2 billion years, according to a new studt published in the Proceedings of the National Academy of Sciences.

paleosol in boulders
2014-09-08 07:08:52

Geologists from Trinity College Dublin have rewritten the evolutionary history books by finding that oxygen-producing life forms were present on Earth some 3 billion years ago – a full 60 million years earlier than previously thought.

Ups And Downs Of Early Atmospheric Oxygen
2014-02-20 10:41:29

UC Riverside research team challenges conventional view of a simple two-step rise in early oxygen on Earth; study suggests instead dynamic oxygen concentrations that rose and fell over billions of years

Life-Bearing Oxygen Appeared On Earth Three Billion Years Ago
2013-09-26 07:19:54

New research from the University of Copenhagen and University of British Columbia (UBC) has revealed that oxygen appeared 700 million years earlier than we previously thought. The findings, published in the journal Nature, raises new questions about the evolution of early life.

Possibility Of A More Dynamic Biological Oxygen Cycle On The Early Earth Than Previously Thought
2013-04-25 10:22:56

A research team of biogeochemists at the University of California, Riverside has provided a new view on the relationship between the earliest accumulation of oxygen in the atmosphere, arguably the most important biological event in Earth history, and its relationship to the sulfur cycle.

Oceanic Volcanoes Reveal Signs Of Ancient Earthen Crust
2013-04-25 07:27:13

For a long time now, scientists have been convinced that lava that has erupted from certain oceanic volcanoes contains material from the crust of early Earth, but decisive evidence has been elusive.

Oxygen's Rise And Fall In The Early Atmosphere And Ocean
2012-10-23 20:44:52

UC Riverside-led research team finds evidence for a dramatic rise in early oxygen about 2.3 billion years ago followed, more surprisingly, by an equally impressive fall

Microbes Produced Oxygen Well Before Great Oxidation Event
2012-09-25 06:15:10

Life on earth began in the oceans, but it would eventually spread to land and a new study suggests that land-dwelling bacteria could have covered large swaths of territory about 2.7 billion years ago, despite a thin ozone layer that would have offered little protection against the sun’s ultraviolet radiation.

Melting Mantle Linked To Great Oxygenation Event 2.5 Billion Years Ago
2012-05-25 04:38:16

Oxygen-based life evolved on Earth because of geological events that occurred over 2.5 million years ago, according to Princeton University researchers who published a report this week in the online journal Nature.

Molecular 'Culprit' Linked To Rise Of Planetary Oxygen
2012-01-11 04:34:18

A turning point in the history of life occurred 2 to 3 billion years ago with the unprecedented appearance and dramatic rise of molecular oxygen. Now researchers report they have identified an enzyme that was the first – or among the first – to generate molecular oxygen on Earth.


Latest Great Oxygenation Event Reference Libraries

Geologic Clock With Events And Periods
2012-11-18 19:08:04

The Paleoproterozoic is the first of three subdivisions of the Proterozoic Eon (occurring from 2.5 billion to 1.6 billion years ago (Ga). This period is marked by the first stabilization of the continents, and also when cyanobacteria--a type of bacteria that uses biochemical processes of photosynthesis to produce oxygen--evolved. Experts have found paleontological evidence that during at least part of the Paleoproterozoic era, about 1.8 Ga, the earth year was about 450 days long, with days...

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Word of the Day
friseur
  • A hairdresser.
The word 'friseur' comes from French friseur, from friser ("to curl, frizz").
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