We've arranged a civilization in which most crucial elements profoundly depend on science and technology.

On the day that we do discover that we are not alone, our society may begin to evolve and transform in some incredible and wondrous new ways.

Any sufficiently crisp question can be answered by a single binary digit-0 or 1, yes or no.

Our ancestors lived out of doors. They were as familiar with the night sky as most of us are with our favorite television programs.

[One's] inability to invalidate your hypothesis is not at all the same thing as proving it true.

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.

Books tap the wisdom of our species -- the greatest minds, the best teachers -- from all over the world and from all our history. And they're patient.