Since, in the long run, every planetary civilization will be endangered by impacts from space, every surviving civilization is obliged to become spacefaring--not because of exploratory or romantic zeal, but for the most practical reason imaginable: staying alive... If our long-term survival is at stake, we have a basic responsibility to our species to venture to other worlds.
« Older "My name really is Michael Jackson. But I don't si... | As 60 year old Seattle native ... Newer »
This thread has been archived and is closed to new comments
Buy a Shirt