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Niger, Mali and Burkina Faso have severed ties from a key West African bloc. Four things you need to know about what the break means for a region destabilized by coups and rising jihadist violence.

A study from Niger reveals a dramatic drop in mortality among children given a twice-yearly dose of azithromycin. Yet concern remains about the potential impact on antibiotic resistance.

Actor Isaiah Washington, from the TV series Grey's Anatomy, discusses his search for family roots and his plans for investing in the West African nation of Sierra Leone.

Jori Lewis tells eye-opening stories of individuals despite scant historical record. At the outset she asks: "How do we tell the stories of people that history forgets and the present avoids?"

Fish are moving away from the equator and toward the poles to maintain their preferred water temperature. That means, for example, that fishermen are seeing swordfish normally found in the Mediterranean swimming near Denmark. But in the tropics, there are no fish to replace the ones that are leaving.

Kyungmi Shin was born in South Korea and emigrated to the U.S. at 19. Colonization, cross-cultural impacts and immigration are all themes in her current exhibition, Father Crosses the Ocean.

Researchers in a new study note that the ocean has gotten 30-40% more acidic since the beginning of the industrial revolution.

Oceans play a vital role in weather and climate change, and scientists are working to rectify their lack of knowledge about that role.

David Lang became an amateur oceanographer by getting a network of ocean lovers to team up and build open source, low-cost underwater explorers.

NPR's Audie Cornish spoke with Ian Urbina, investigative reporter for The New York Times, about his four-part series, The Outlaw Ocean. He says the lack of rules contributes to the ocean's dire state.