In 2003, the museum began a campaign to transform its exhibits and visitor experience. The museum reopened its seismically retrofitted renovated 1913 rotunda, along with the new Age of Mammals exhibition.[3] in 2010. Its Dinosaur Hall opened in July 2011. A new Los Angeles history exhibition, Becoming Los Angeles, opened in 2013. The outdoor Nature Gardens and Nature Lab, which explore L.A. wildlife, also opened in 2013.