The Degree of Fine-Tuning in our Universe – and Others Fred Adams – Ta-You Wu Collegiate Professor (U-M Physics) The fundamental constants of nature must fall within a range of values in order for the universe to develop structure and ultimately support life. The relevant parameters include the strengths of the fundamental forces, particle masses, cosmic energy densities, abundances of ordinary matter and dark matter, and the amplitude of primordial density fluctuations. This talk considers current constraints on these quantities and assesses the degree of tuning required for the universe to be viable.