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They could shoot up to 24,000 feet and maintain that altitude in a long-distance migration across the Himalayas. But it's more efficient for bar-headed geese to soar and dive, scientists find.

Federal workers can take an advance of up to six weeks of sick leave under a new policy unveiled Thursday. The White House is urging Congress to make paid sick leave mandatory.

Is the U.S. gaining or losing ground in its bombing campaign against ISIS? Audie Cornish puts the question to Jennifer Cafarella, a fellow at the Institute for the Study of War.

On Thursday, the World Health Organization released a 14-chapter analysis of the Ebola epidemic.

Melissa Block speaks with French lawyer Aurélien Hamelle about the limits on free speech in France.

Angry mobs that targeted health workers. A single funeral that infected 365 people. No isolation wards in Liberia. These are some of the striking points in WHO's new analysis.

The Obama administration is following through on its pledge to ease travel and trade restrictions on Cuba. The Treasury and Commerce Departments say the new rules they have just issued go into effect on Friday. Critics of the administration, though, are questioning the legality of the moves.

In Dakar, Senegal, two rappers going by the names Keyti and Xuman offer a summary of the week's news in hip-hop format.

For astronomers, it’s not all black and white…At first glance, our night skies can appear as a dark canvas illuminated with points of mono-hued light.…

Like Amedy Coulibaly, the man who authorities say carried out the deadly attack in Paris, Lassana Bathily is a Muslim with ties to Mali. Last week, he saved several people from Coulibaly.