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It turns out that when scientists collaborate internationally, they are more like to have an impact on science than purely domestic collaborations.

In Lima, Peru, almost all of the world's governments agreed on a document meant to galvanize efforts to curb climate change. While the outcome was modest, it did establish some important principles.

The situation began unfolding during morning rush hour, when a gunman entered the Lindt Chocolat Cafe in downtown Sydney. The gunman and two others died after police stormed the cafe.

Now, only five remain in the world. Angalifu was thought to be 44 years old. He died of old age.

The lawsuit filed on behalf of 10 victims claims that the Bushmaster AR-15 rifle never should have been sold to the public because it is a military weapon.

Code Switch contributor Alex Laughlin explores the nuance and meaning of an increasingly popular identifier.

Uber's "surge pricing" quadrupled fares for some customers trying to flee the area in Sydney where a gunman took hostages. France banned Uber's low-cost service over its lack of professional licenses.

Even in an age of galloping ambition, the Texan rides ahead of the pack. Obama liked to quote Martin Luther King's line about "the fierce urgency of now," Cruz seeks to embody it at every turn.

Researchers found that leftists — and their conservative counterparts — were more physically active than centrists. Another tongue-in-cheek study in the journal concluded that men are idiots.

In the face of abuse concerns, Medicare covered more prescriptions for potent controlled substances in 2012 than in 2011. Top prescribers often have faced disciplinary action or criminal charges.