Physicist Stephen Hawking is calling for efforts to populate outer space. He cites the danger of life surviving on earth and wants human colonies to be established in outer space so that the race survives in case anything happens to mother earth. He says that it is feasible for self supporting colonies to be established in moon in the next 20 years and in mars in the next 40.
A whole new world awaits us outside the earth. And clearly efforts must be made to make human habitations outside. It would be difficult and tough as all things are in the beginning but who knows maybe 300 years from now, people will be applying for visa at the embassy of moon in New York.
But while we dream of such remarkable things, it doesnt mean that we can treat earth's fate casually. For the fact remains that it will support the bulk of the people for a long time. And the problems that it face are enormous and these should get the higher priority. Problems like global warming, nuclear war etc.
In populating outer space, perhaps the excitement is akin to that which was there in Europe when America was discovered.