You are given a passage. Using the information present in the passage, you need to classify it into one of the 10 topics: 0 - 'Society & Culture', 1 - 'Science & Mathematics', 2 - 'Health', 3 - 'Education & Reference', 4 - 'Computers & Internet', 5 - 'Sports', 6 - 'Business & Finance', 7 - 'Entertainment & Music', 8 - 'Family & Relationships', 9 - 'Politics & Government'.

Answers to this question can vary greatly, but a good framework to think about it is the Drake Equation.  Developed by Frank Drake and Carl Sagan, it runs through some of the key factors that will effect the viability of life on other planets.  As we learn more about extrasolar planets and astrobiology, we are getting better limits on some of the parameters in the equation, but especially when it comes to the terms where we look for intelligent life that can last long enough to contact other species, we have very little data to go on.\n\nSo when it comes down to the last few terms you need to take it all with a grain of salt.\n\nIf you are simply talking about life, I think recent discoveries have made the likelihood very high.  The discovery of many extrasolar planets including some that are closer to Earth size means that there are specific places we can point to where life may have formed or be forming.  Even in stranger systems that feature planets several times Jupiter's mass, it is possible that a terrestrial satellite of such a large planet could harbor the right conditions for life.\n\nIt's a fun thing to work through the Drake equation yourself.  Since the last few terms are more subjective (at least until we get more data), it's fun to play with it and see where you stand.\n\nThe best guess that scientists have put forward right now is:\n\nN = 10 × 0.5 × 2 × 0.33 × 1×10-7 × 0.01 × 67 = 2.211×10-7 = 0.0000002211\n\nwhere N is the number of intelligent extraterrestrial civilizations that might come to communicate with us in a year.  \n\nTo get the number of planets that reach a point of harboring life (not intelligent) in a year, we just take the first 4 terms:\n\n10 × 0.5 × 2 × 0.33 = 3.3\n\nSo about 3.3 new planets reach the point where life forms per year.
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