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      [Noun]  | "mass extinction" 


      1: an event in which many living species on Earth experience rapid extinction rates during a relatively short period of geologic time; specifically : a rare event in which seventy-five percent or more of all living species on Earth die out within a relatively short period of geologic time and that is usually associated with catastrophic natural phenomena (such as volcanic eruptions or asteroid impacts)


      Origin: 1943 ;

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       [ "mass extinction" ]

      1: What we're causing.

        * e.g.,  ... It's been stated that there is a mass extinction going on right now and us humans are causing it. 

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