Princeton University, United States is ranked as one of the best universities in the world. Today an industrial outdoor sculpture invites Princeton University visitors to walk, between Peyton Hall and Fine Hall, through its steel curves in order to experience art, space, and environment in a physical way. Known as “The Fox and the Hedgehog” the Richard Serra’s sculpture invite you to walk through fundamental problems. Nuclear physics at Princeton in the 1930s was a field where researchers from around the world found themselves as hedgehogs.