The national board of the Screen Actors Guild-American Federation of Television and Radio Artists approves negotiated contracts regarding commercial work.
Leaders of 175 countries meet in Paris to sign a comprehensive agreement on climate change.
Prison inmates held in solitary confinement exhibit symptoms including hallucinations, increased anxiety, and chronic depression.
A study is done on how rumors spread on Twitter.
Scientists are studying the fossils of a smaller ancestor of the Tyrannosaurus Rex to see how their brain might have developed.
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