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Comparative parasitology supports the evolutionary hypothesis. If two animals have a common ancestor, their parasites are likely to be descended from those of the ancestor. This principle has been applied with considerable effect to the classification of frogs and other groups.

— J. B. S. Haldane The Causes of Evolution (1932)

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More quotes by J. B. S. Haldane

An inordinate fondness for beetles.

Another possible mode of making rapid evolutionary jumps is by hybridisation.

The Causes of Evolution (1932)

Our ancestors were mostly rather rare creatures.

The Causes of Evolution (1932)

I have no doubt that in reality the future will be vastly more surprising than anything I can imagine.

Possible Worlds and Other Essays (1927)

The universe is not only queerer than we imagine, but queerer than we can imagine.

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