By Brian SwitekSeptember 29, 2010 There may be many more “extinct” mammals waiting to be rediscovered than conservation biologists previously thought. Categorizing a mammal species as extinct has rested upon two criteria: It has not been seen for more than 50 years, or an exhaustive search has come up empty. But “extinct” species occasionally turn [...]
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A Third of ‘Extinct’ Mammals May Still Be Alive
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