January 14, 2009 1:47 pm Thrill Seeker? How your brain regulates dopamine may predict how many risks you take. US & World Videos 21:18 Jim Gaffigan gives hilarious dad advice to Kelly Clarkson audience 9:45 Orlando Bloom says he's shocked he's still alive after filming his new adventure show 9:22 Mississippi nonprofit tackles poverty head-on through radical approach 2:13 Ryan Gosling talks Emily Blunt's ‘next level' fight scene in ‘The Fall Guy' 1:33 ‘Mary & George' actor Nicholas Galitzine broke his ankle wearing high heels during filming