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How do we actually know that a species is totally extinct?
Topic: Science , Subtopic: Zoology
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How do we actually know that a species is extinct if we cannot check thoroughly enough to be 100% sure?...
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What are the largest land mammals found in the wild in the US?
Topic: Science , Subtopic: Zoology
Africa has so many large wild land mammals, so it's interesting to think about the mammals found in the wild in the US. The largest I can think of is some kind of bear possibly? What is the largest land mammal found in the wild in the US?...