March 8, 2011 8:00 pm Marathon Mountaineer Mitch Lewis wants to run a marathon and climb a mountain on every continent. US & World Videos 3:23 UC Davis finds brain sizes are growing 3:36 Waymo expands driverless taxi service 5:21 A closer look: 2 police officers shot, injured in San Jose 1:26 Pursuit standoff ends in the North Bay 2:40 Pro-Palestinian protests continue at UC Berkeley