News tagged with oxygen levels

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The rise and fall of oxygen

How long has Earth's atmosphere included oxygen? A recent paper suggests low levels of oxygen appeared in the atmosphere approximately 2.95 billion years ago. That's about 550 million years earlier than previously thought.

dateDec 11, 2013 in Earth Sciences
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New bacterium forms intracellular minerals

A new species of photosynthetic bacterium has come to light: it is able to control the formation of minerals (calcium, magnesium, barium and strontium carbonates) within its own organism. Published in Science on April 27, ...

dateMay 11, 2012 in Cell & Microbiology
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Researchers solve plant sex cell mystery

( -- Although farmers have been manipulating plant germlines since the Neolithic, plant sex cells have stubbornly guarded the secret of their origin. The surprisingly simple answer – low oxygen levels – ...

dateAug 07, 2012 in Biotechnology
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