■Class discussion: Do you think it is likely that we will find evidence of life on other planets? What would it mean to you if you knew there were other life in the universe? What is the possibility of ever finding intelligent life out there? Given the immense distances, do you think human beings will ever reach another habitable planet? Should we just concentrate on surviving here on Earth? Or, should we also try to find or build a “lifeboat” for humanity out in space?
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