China by far is bearing the biggest burden of the new coronavirus outbreak — only about 100 cases have been reported outside the country. But on Thursday, the World Health Organization declared it a public health emergency of international concern, while at the same time recommending countries not limit trade and travel to China. Michael Mina, an infectious disease specialist at Harvard, explains what's known at this point about this disease and the best ways to respond.

A new animation academy is bringing hope to some of the most violent neighborhoods in South Africa.
A factory in Haiti provides a tree-saving alternative to charcoal by producing briquettes made from trash.
A growing movement among Palestinians in the West Bank advocates non-violent resistance to Israeli occupation.
While President Obama pushes banking reform in the US, leaders in other countries call for a more coordinated global effort.
Journalist Roxana Saberi on how music helped her pass the time in an Iranian prison where she was incarcerated in 2009.
Geoengineering could help with climate change, but the possibility of massive climate interventions raises big concerns.
President Obama wants to change the tax rate for American multinationals, who he says don't pay their fair share for overseas profits.
Last weekend's tragedy in Katyn seems doubly cursed and underscored its meaning in history and Polish-Russian relations.
The violence in the streets of Bangkok over the weekend was the worst in nearly 20 years, as anti-government protesters clashed with security forces.
Nuclear treaty serves diplomatic and domestic goals for US and Russia, but changes little in strategic relationship.