Whenever you speak to someone, you are presuming the two of you have a certain degree of familiarity - which your words might alter. So every sentence has to do two things at once: convey a message and continue to negotiate that relationship.

The costs of an ignorance of science are nor just practical ones like misbegotten policies, forgone cures, and a unilateral disarmament in national competitiveness. There is a moral cost as well. It is an astonishing fact about our species that we understand so much about the history of the universe. the forces that make it tick, the stuff it's made of; the origin of living things, and the machinery of life. A failure to nurture this knowledge shows a philistine indifference to the magnificent achievements humanity is capable of; like allowing a great work of art to molder in a warehouse.

The indispensability of reason does not imply that individual people are always rational or are unswayed by passion and illusion. It only means that people are capable of reason, and that a community of people who choose to perfect this faculty and to exercise it openly and fairly can collectively reason their way to sounder conclusions in the long run. As Lincoln observed, you can fool all of the people some of the time, and you can fool some of the people all of the time, but you can't fool all of the people all of the time.

An eye for beauty locks onto faces that show signs of health and fertility - just as one would predict if it had evolved to help the beholder find the fittest mate.

Photography is a demanding action sport. The light can change so quickly. I often find myself sprinting so that I can catch the perfect light falling on a photogenic subject.

Without goals the very concept of intelligence is meaningless

In the speech sound wave, one word runs into the next seamlessly; there are no little silences between spoken words the way there are white spaces between written words. We simply hallucinate word boundaries when we reach the end of a stretch of sound that matches some entry in our mental dictionary.