Assessing existence while failing to embrace the insights of modern physics would be like wrestling in the dark with an unknown opponent.

Science is the greatest of all adventure stories, one that's been unfolding for thousands of years as we have sought to understand ourselves and our surroundings.

A unified theory would put us at the doorstep of a vast universe of things that we could finally explore with precision.

Sometimes attaining the deepest familiarity with a question is our best substitute for actually having the answer.

One of the wonders of science is that it is completely universal. It crosses national boundaries with total ease.

When we benefit from CT scanners, M.R.I. devices, pacemakers and arterial stents, we can immediately appreciate how science affects the quality of our lives.

Many different planets are many different distances from their host star; we find ourselves at this distance because if we were closer or farther away, the temperature would be hotter or colder, eliminating liquid water, an essential ingredient for our survival.