Has Snowden crossed a red line?
The Butterfly Nebula
WATCH: 41 historic demises
The House's cold war over the IRS scandal just turned hot
The world's wealthy: By the numbers
Time to stop looking for Hoffa?
3D-printed batteries the size of a grain of sand
John Oliver tackles the politics of immigration reform
Michael Hastings, remembered
Christie, the NFL, and the presidency
Earth's enormous scope
Washington has an Edward Snowden problem
Can one protester change history?
7 better color-changers than chameleons
LATEST: Is it murder if a pregnant woman attempts suicide... and the baby dies?
The election's pregnant pause
'Women on Waves': A guide to the Dutch 'abortion ship'
'Rape can't cause pregnancy': A brief history of Todd Akin's bogus theory
The 'most extreme' abortion ban in America: A guide
Is South Dakota wrong to tell women that abortion could lead to suicide?
Would easy in-utero genetic testing encourage abortions?
The doctor forced to pay child support after a botched abortion