The Carnegie Arts Center’s Sunday lecture series will be exploring the contribution of thousands of Chinese migrants in building America’s first Transcontinental Railroad at 2 p.m. June 12 at the Carnegie Art Center. Hilton Obenzinger, Ph.D., a professor at Stanford University, will be speaking on the topic of “The Chinese Railroad Workers in North America Project.” Obenzinger said the major project seeks to give a voice to Chinese migrants, who from 1865 to 1869, helped revolutionize transportation and united the nation’s east and west coasts.