Concerns About Russia Fuel New Calls For Gas Exports

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Russia is the world's top natural gas exporter, but the U.S. is the top producer. Jason Bordoff, director of the Center on Global Energy Policy, explains efforts to get American gas to Europe.

WATCH: Obama Reads 'Mean Tweets' — Including One From Trump

President Obama returned to ABC's Jimmy Kimmel Live on Monday. He took 140-character admonishments for his dancing, his alleged condiment preferences and someone else's poor choice of conditioner.

Dental Detectives: What Fossil Teeth Reveal About Ancestral Human Diets

From the thickness of tooth enamel to the molecular signatures on a tooth left behind by foods eaten by a human, fossil teeth hold many clues to the diets of our ancestors.

Not Fit To Print? When Politicians Talk Dirty, Media Scramble To Sanitize

Donald Trump isn't the first politician to use coarse language, but linguist Geoff Nunberg says the 2005 Access Hollywood tape of him discussing women's genitalia wasn't like other live-mic incidents.

AT&T Deal For Time Warner Casts Renewed Attention On CNN

AT&T's chief promises to maintain CNN's journalistic independence after parent Time Warner merges with the telecom giant. CNN got a $100 million boost this year, propelled by coverage of Donald Trump.

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