July 10, 2015 11:50 pm South American Tropical Rainforest and Aviary Exhibit Opens at San Francisco Zoo Approximately 100 South American animals will now call the San Francisco Zoo home when it opens its latest exhibit on Saturday. Ian Cull reports. US & World Videos 0:28 A Vermont state trooper plunges into icy pond to rescue 8-year-old girl 2:59 Keep these travel etiquette tips in mind this holiday season