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When Life Nearly Died: The Greatest Mass

When Life Nearly Died: The Greatest Mass

When Life Nearly Died: The Greatest Mass Extinction of All Time by Michael Benton

When Life Nearly Died: The Greatest Mass Extinction of All Time



Download When Life Nearly Died: The Greatest Mass Extinction of All Time

When Life Nearly Died: The Greatest Mass Extinction of All Time Michael Benton ebook
Page: 336
ISBN: 9780500285732
Format: pdf
Publisher: W W Norton & Co Inc


Specifically, this burst must have come from a massive stellar explosion known as a hypernova - an explosion at least a hundred times more powerful than the average supernova - that happened about a thousand light-years away. We still don't know what by a gamma-ray burst. But the Ordovician was still plenty bad, driving more than 60% of all marine species extinct - and since nearly all complex life still lived in the sea back then, that was particularly devastating. Members of the Climate Central staff and board are among the most respected leaders in climate science. Today, thanks to greenhouse gases from the burning of fossil fuels; deforestation and other changes wrought by human activity, biologists believe a sixth great extinction is under way. Staff members are authorities in communicating . Posted on February 25, 2013 by mouldonigys. Five times in the history of life on Earth, mass extinctions have eliminated at least three-quarters of the species that were present before each episode began. Benton lays out the scientific evidence for this epochal tragedy in a recent book, When Life Nearly Died: The Greatest Mass Extinction of All Time. Scientists say CO2 from volcanic eruptions wiped out nearly all living species 200 million years ago. Sometimes, something kills nearly all life on the entire planet. When Life Nearly Died The Greatest Mass Extinction of All Time (9780500051160) Michael J. We measure the richness Though they may appear minor, some of these short-term fluctuations were the most dramatic events in life's history, precipitous drops in biodiversity known as mass extinctions. But is there a regular cycle to Out of all the things that live and die on Earth, a small fraction becomes entombed in mud or sand and fossilizes, forming over time a grand tableau of life's history.

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