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Leave things alone and pretty soon Earth will have real space travel.
You can figure out who that would be and what use they'd make of space travel!
"Just in case they have space travel technology as well."
What we have developed is a form of space travel.
But the section on space travel was three million years old.
They asked if any of those nations had space travel.
We have no plans for space travel - at the moment.
Certainly, the risks of space travel will still be high for some time to come.
He was still new enough to space travel to find most things unbelievable.
In the early days of space travel, all spacecraft used to have them.
The problems of space travel that no one ever talks about.
So what we need, quite simply, is greater commitment and more support for a policy on space travel.
Space travel seemed like a lot of effort to get somewhere no one wanted to go.
All three shows are designed to bring space travel closer to home.
She was meant for space travel no doubt about that.
Are you going to put a stop to space travel?"
Air and space travel did not often concern itself with weather.
Ten years from now, commercial space travel will be a reality.
By the end of this century space travel will be cheap.
At the time of his death, he was planning to direct a movie about space travel.
After all, they already knew about space travel; it was simply ancient history to them.
Technology has come forward enough to allow things such as the internet, space travel and television.
Nothing like it had ever happened in all the centuries of space travel.
It was a lesson they'd never seemed to learn in the early days of space travel.
In all my years of space travel I have never seen a nebula quite like this one.