God abhors a naked singularity.

No one can resist the idea of a crippled genius.

A model is a good model if first it interprets a wide range of observations in terms of a simple and elegant model, and second if the model makes definite predictions that can be tested, and possibly falsified, by observation.

Nothing is better than reading and gaining more and more knowledge.

Our population and our use of the finite resources of planet Earth are growing exponentially, along with our technical ability to change the environment for good or ill. But our genetic code still carries the selfish and aggressive instincts that were of survival advantage in the past. It will be difficult enough to avoid disaster in the next hundred years, let alone the next thousand or million. Our only chance of long term survival, is not to remain inward looking on planet Earth, but to spread out into space.

A million million million million (1 with twenty-four zeros after it) miles, the size of the observable universe.

It's the gravity that shapes the large scale structure of the universe, even though it is the weakest of four categories of forces