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Every species has come into existence coincident both in space and time with a pre-existing closely allied species.

— Alfred Russel Wallace On the Law which has Regulated the Introduction of New Species (1855)

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More quotes by Alfred Russel Wallace

The marvelous collection of forces which appear to control matter, if not actually to constitute it, are and must be mind products.

Arne Wyller in Planetary Mind (1995)

If I had to fix on two only as representing the perfection of the two classes, I should certainly choose the Durian and the Orange as the king and queen of fruits.

He [the naturalist] looks upon every species of animal and plant now living as the individual letters which go to make up one of the volumes of our earth's history; and, as a few lost letters may make a sentence unintelligible, so the extinction of the numerous forms of life which the progress of cultivation invariably entails will necessarily render obscure this invaluable record of the past.

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Quote text and notes from Wikiquote: Alfred Russel Wallace (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.