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In 1973 , evolutionary biologist Theodosius Dobzhansky penned that " nothing in biology makes sense except in the light of evolution , " because it has brought to light the relations of what first seemed disjointed facts in natural history into a coherent explanatory body of knowledge that describes and predicts many observable facts about life on this planet .
 Theodosius Dobzhansky
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Answer:
 Theodosius Dobzhansky