When we try to observe things that are very small, the act of observation itself will significantly disturb the state we are seeking to measure.

There was no "before" the beginning of our universe, because once upon a time there was no time.

If all the stars and galaxies in the universe today were smoothed out into a uniform sea of atoms, there would only be about one atom in every cubic meter of space.

Once upon a time when there was no time.

Apparently, a great deal of dark, unseen material exists, whose gravitational pull is responsible for the motions of the stars and galaxies that we see.

History is full of people who thought they were right -- absolutely right, completely right, without a shadow of a doubt. And because history never seems like history when you are living through it, it is tempting for us to think the same.

We can never know the origins of the universe. The deepest secrets are the ones that keep themselves.