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I don't think the human race will survive the next thousand years, unless we spread into space.

As lifespan increases fertility rates go down all over the world. Humans will create better technology and space travel will increase. These are all good signs for the future.

There's going to be space travel at some point.

It's not going to be just humans colonizing space, it's going to be life moving out from the Earth, moving it into its kingdom. And the kingdom of life, of course, is going to be the universe.

But I don't think we'll go there until we go back to the moon and develop a technology base for living and working and transporting ourselves through space.

Eventually there are going to be cities in space.

I believe, I truly believe, that humans will be living off of this planet, at some point in the future. It's inevitable for us, and it seems like a reasonable and realistic progression for us as a human race. We won't last on this planet - not forever.

Some day we'll move into space and start ensuring the survival of our species beyond Earth, whether it happens in a hundred years or a thousand.

In order for us to have a future that's exciting and inspiring, it has to be one where we're a space-bearing civilization.