| CNN.com delivers up-to-the-minute news and information on the latest top stories, weather, entertainment, politics and more. | Obama wants to understand your brain | | President Barack Obama on Tuesday unveiled a $100 million initiative to unlock the "enormous mystery" of the human brain in hopes of boosting the understanding and treatment of brain disorders. |
| 'Buckwild' star's death cause revealed | | Shain Gandee, one of the stars of the MTV reality show "Buckwild," and two other people died of carbon monoxide poisoning, the sheriff's office in Kanawha County, West Virginia, said Tuesday. |
| U.S. spill gives ammo to Keystone foes | | An Arkansas pipeline spill that coated streets and lawns with a smelly, asphalt-like crude oil provides opponents of the proposed Keystone XL pipeline with new ammunition to combat the project that would bring more of the tar sands bitumen from Canada. |
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