Mankind is destined to step beyond his earthly bonds just as his ancestors once crawled out of the seas. Colonizing new worlds… — Charles Sheldon Copy Share Image
Once it was necessary that the people should multiply and be fruitful if the race was to survive. But now to preserve… — Helen Keller Copy Share Image
I don't think the human race will survive the next thousand years, unless we spread into space. — Stephen Hawking Copy Share Image
I don't think the human race will survive the next thousand years, unless we spread into space. There are too many accidents… — Stephen Hawking Copy Share Image
