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Published online by Cambridge University Press: 25 May 2016
In a well known paper written a quarter century ago, cosmology was described as a search for two numbers (Sandage 1970). As those of you who have attended any of the parallel sessions of Symposium 167 surely appreciate, today's cosmologists find more than just two numbers interesting. It is likewise clear from the present symposium that the number of interesting parameters associated with the Milky Way is very much greater than two.