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Selfies aren't only for posting pictures of yourself. For people who suffer from Cotard's Delusion, in which a person believes they're dead, those self-taken pictures can be part of a cure.

Robert Dear lived off the grid, and those who knew him described a troubled man who preferred solitude. Police say Dear opened fire at a Planned Parenthood center, killing three and wounding nine.

Protesters gathered on the eve of a global conference on climate change. About 200 activists defied a ban on mass demonstrations and they were met by riot police.

The 1997 Kyoto treaty set targets for cutting greenhouse gas emissions that many nations didn't meet. This time, stakes are higher and all countries will be asked to set and meet their own limits.

Sixty years ago Tuesday, Rosa Parks was arrested for refusing to give up her seat on a bus. Recruits in Montgomery, Ala., are learning about Parks in a course aimed at eliminating bias in policing.

Savvy patients want the best medical care for the best deal, and online calculators seem like a great way to compare the cost of common scans and procedures. But many are inaccurate.

The Kyoto Protocol of 1997 didn't slow down the gradual warming of the planet. Now governments meeting for a two-week summit are trying an a la carte approach.

Indiana is trying to make the path to a high school diploma more rigorous, but some special education students worry they won't be able to meet new requirements.

Turkish Prime Minister Ahmet Davutoglu said his country was defending its airspace. "Protection of Turkish airspace, Turkish borders is a national duty," Davutoglu said.

Leaders from around the world are converging on Paris for the 2015 U.N. Climate Change Conference. Listen to our special coverage to find out what you should know and what's at stake.