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The Great Oxidation Event (GOE) or Great Oxygenation Event, also called the Oxygen Catastrophe, Oxygen Revolution, Oxygen Crisis or Oxygen Holocaust, [2] was a time interval during the Earth's Paleoproterozoic era when the Earth's atmosphere and shallow seas first experienced a rise in the concentration of free oxygen. [3]
Visual representation of the Logarithmic timeline in the scale of the universe. This timeline shows the whole history of the universe, the Earth, and mankind in one table. . Each row is defined in years ago, that is, years before the present date, with the earliest times at the top of the ch
The earliest evidence for life on Earth includes: 3.8 billion-year-old biogenic hematite in a banded iron formation of the Nuvvuagittuq Greenstone Belt in Canada; [30] graphite in 3.7 billion-year-old metasedimentary rocks in western Greenland; [31] and microbial mat fossils in 3.48 billion-year-old sandstone in Western Australia.
But just two years later, in 2018, the Swedish DJ and musician tragically died by suicide at the age of 28. Born in Stockholm as Tim Bergling, Avicii began releasing electronic dance music in 2008.
Four years ago on Jan. 6, not even most Republicans would have imagined this 2025 anniversary: The West Front of the Capitol — where rioters battled outnumbered police to breach the building ...
The trial of Karen Read, accused of killing her boyfriend, police officer John O’Keefe, on a snowy night in 2022, starts today in suburban Boston. The case has sparked conspiracy theories ...
Photosynthetic organisms appeared between 3.2 and 2.4 billion years ago and began enriching the atmosphere with oxygen. Life remained mostly small and microscopic until about 580 million years ago, when complex multicellular life arose, developed over time, and culminated in the Cambrian Explosion about 538.8 million years ago. This sudden ...
Many people thought the solution to that problem had arrived two years ago, on December 14, 2020, when Sandra Lindsay became the first person in the U.S. to get a Covid vaccine outside of a ...