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.

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.

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.

One would normally define a "religion" as a system of ideas that contain statements that cannot be logically or observationally demonstrated... Gödels theorem not only demonstrates that meathematics is a religion, but shows that mathematics is the only religion that proves itself to be one!

Some things are as they are regardless of what they were.

We can predict the present without having to know everything about the past.

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