Nature of the Universe

The boundary condition of the universe…is that it has no boundary.

Stephen Hawking – A Brief History of Time

Time travel used to be thought of as just science fiction, but Einstein’s general theory of relativity allows for the possibility that we could warp space-time so much that you could go off in a rocket and return before you set out.

Stephen Hawking – A Brief History of Time

The odds against a universe like ours emerging out of something like the big bang are enormous.

Stephen Hawking – A Brief History of Time

It is not necessary to invoke God to light the blue torch paper and set the universe going.

Stephen Hawking – A Brief History of Time

There could be shadow galaxies, shadow stars, and even shadow people.

Stephen Hawking – A Brief History of Time