Once intelligent beings achieve technology and the capacity for self-destruction of their species, the… — Carl Sagan
Once intelligent beings achieve technology and the capacity for self-destruction of their species, the selective advantage of intelligence becomes more uncertain.
p. 240Source: Wikiquote · CC BY-SA 4.0
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A mutation in a DNA molecule within a chromosome of a skin cell in my index finger has no influence on heredity. Fingers are not involved, at least directly, in the propagation of the species.
p. 27
There is a popular contention that half or more of the brain is unused. From an evolutionary point of view this would be quite extraordinary: why should it have evolved if it had no function? But actually the statement is made on very little evidence.
p. 31
Absence of evidence is not evidence of absence.
p. 7
