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  4. John B. S. Haldane
  5. There are 400,000 species of beetles on this planet, but...

There are 400,000 species of beetles on this planet, but only 8,000 species of mammals.

John B. S. Haldane
Mammals, Planets, Species
There are 400,000 species of beetles on this planet, but only 8,000 species of mammals.