Answers

2015-06-24T20:19:40+05:30
It's believed that life can exist in some other planet and so they trying to find new life forms in space. It is believed that there was a blast millions of years ago which resulted into space and it's known as the big bang theory. The space is still expanding.
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2015-06-25T17:19:56+05:30
Because as everybody knows earth will end after 4 .3 billion yrs everybody wants to prepare a backup plan.

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