Ecology / Ecologies News, or Fronts

Five times in Earth’s history, some three-quarters of all living species disappeared forever — and within a short period of time. These mass-extinction events marked the boundaries between different periods in geologic time.
Species are dying off at such a rapid rate — faster than at any other time in human existence — that many resources on which we depend may disappear.
STUDENT.SOCIETYFORSCIENCE.ORG

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