“Extinction rates for birds, mammals and amphibians are similar to the five global mass-extinction events of the past 500 million years that probably resulted from meteorite impacts, massive volcanism and other cataclysmic forces.”
By Ian Johnston, Environment Correspondent
Humans are bringing about the sixth mass extinction of life on Earth, according to scientists writing in a special edition of the leading journal Nature.
Mammals, birds and amphibians are currently becoming extinct at rates comparable to the previous five mass extinctions when “cataclysmic forces” – such as massive meteorite strikes and supervolcano explosions – wiped out vast swathes of life, including the dinosaurs...
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