"Somewhere, something incredible is waiting to be known."
"There are many other (besides testosterone) behaviour-eliciting hormones fundamental for humen well-being, including estrogen and progesterone in females. The fact that complex behavioural patterns can be triggered by a tiny concentration of moleculas coursing through the bloodstream, and that different animals of the same species generate different amounts of these hormones, is something worth thinking about when it's time to judge such matters as free will, individual responsibility, and law and order."
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Source: Carl Sagan (2011). “Demon-Haunted World: Science as a Candle in the Dark”, p.429, Ballantine Books
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