cr0iv6earnthis
cr0iv6earnthis
10-08-2016
Social Studies
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What is mass extinction?
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michaeljan111
michaeljan111
10-08-2016
An extinction event (also known as a mass extinction or biotic crisis) is a widespread and rapid decrease in the amount of life on Earth. Such an event is identified by a sharp change in the diversity and abundance of multicellular organisms.
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