DOWNTOWN LOS ANGELES - In December the museum will open Becoming Los Angeles, an exhibit that explores the natural and cultural history of Los Angeles and Southern California. The 14,000-square-foot permanent exhibition will look into 500 years of local history. It is part of the Exposition Park attraction's seven-year, $135 million transformation. Coming in 2013 is the North Campus, a 3.5-acre project that will create a new "front yard" for the facility, with outdoor exhibits in 11 zones. A new entrance will be revealed in November 2013 at the celebration of the NHM's 100th anniversary. The Dinosaur Hall, the most prominent element of the Natural History Museum's extensive upgrade, opened last summer. At

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