There are reasons, increasing in number and quality, to believe that the masses of ordinary galaxies may have been underestimated by a factor of 10 or more.

The discrepancy between what was expected and what has been observed has grown over the years, and we're straining harder and harder to fill the gap.

Biology has tended to be an observational science and deriving things from first principles has not been possible in the past but I hate to predict the future on that.

There's no observational evidence that I know of that indicates electric and magnetic forces are important on cosmological scales.

If life is for love, then start loving at this very moment.

Conflict avoidance often causes greater conflict.

One cannot live without motives. I have no motives left, and I am living.

Left to our own devices and passions, we human beings have a hard time seeing beyond what is immediately in front of us.

I don't get to watch a lot of TV. I just do all my news and reading and "Meet the Press," all that fun, exciting stuff.

In this ridiculously polarized, obstructionist world, the operating principle should be, Let's get something done. Not, Let's freeze everything.

Don't wait until you get hungry to eat. Eating throughout the day is best. And obviously sleep is important.

My wife and daughter have accused me of being too silent at breakfast but I don't want to talk when I don't have much to say.

Caring for others is the basis of worldly success.

You don't have to wait till your party's in power to have an impact on life at home and around the world.