Climate Change July 23, 2020 4:10 am Extinction Event: How Climate Change May Spell Doom for the Polar Bear New study reveals the polar bear may become extinct by end of the 21st century because of climate change. US & World Videos 1:35 AANHPI celebrations in San Francisco's Japantown, Chinatown 3:06 Rob's forecast: Clearing and warming ahead 2:07 Smash-and-grab thieves hit Sunnyvale jewelry store 0:47 Suspect critically injured following standoff on I-80 in Solano County 1:48 Four tow trucks burned in Concord, Bay Point