The root cause of the looming energy problem - and the key to easing environmental, economic and religious tensions while improving public health - is to address the unending, and unequal, growth of the human population. And the one proven way to reduce fertility rates is to empower young women by educating them.

The ultimate arbiter of truth is experiment, not the comfort one derives from one's a priori beliefs, nor the beauty or elegance one ascribes to one's theoretical models.

For the record: Quantum mechanics does not deny the existence of objective reality. Nor does it imply that mere thoughts can change external events. Effects still require causes, so if you want to change the universe, you need to act on it.

We live at a very special time . . . the only time when we can observationally verify that we live at a very special time!

The lack of understanding of something is not evidence for God. It's evidence of a lack of understanding.

If our species is to survive, our future will probably require outposts beyond our own planet.

You are all stardust.