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Peter Payette is the Executive Director of Interlochen Public Radio and has managed the news department since 2001. For more than a decade, he hosted the weekly programPoints North and has reported on a wide range of issues critical to the culture and economy of northern Michigan. His work has been featured on NPR, Michigan Radio, Bridge magazine and Edible Grande Traverse. He has taught journalism and radio production to students and adults at Interlochen Center for the Arts. He is also working on a book about the use of aquaculture to manage Great Lakes fisheries, particularly the use of salmon from the Pacific Ocean to create a sport fishery in the 1960s.

NPR's Mary Louise Kelly talks with investigative reporter Ian Urbina about his piece The New Yorker. He headed into Libya to better understand its role in migrants' movement toward Europe.

In honor of Women's History Month, NPR takes a look at five women photographing the worst effects of climate change around the world.

NPR's John Nielsen reports that increasing the supply of iron in the world's oceans could help fight global warming. More iron in the ocean generates larger phytoplankton which in turn soak up carbon dioxide, the main contributor to global warming. The idea, known as the "iron hypothesis," has been around for years, but is slowly gaining more currency among oceanographers. (3:40) (Stations: studies on the topic are featured in the latest edition of the journal, "Nat

Two companies say the best way to slow global warming is to dump iron into the oceans. The iron would trigger blooms of tiny plants that suck carbon dioxide out of the atmosphere and then keep it trapped deep in the ocean. But scientists are wary.

There have been five major mass extinctions over the last half-billion years, when the diversity of life on Earth suddenly and dramatically contracted. Scientists are currently monitoring an era of mass extinction predicted to be the most devastating since the asteroid impact that wiped out the dinosaurs. But this time around, says Elizabeth Kolbert, author of The Sixth Extinction, it's humans that are causing it.

"The discovery signals a potentially habitable environment in the ocean of Europa," according to the Webb Space Telescope's website.

Host Bob Edwards talks with NPR's Brenda Wilson in Pretoria, South Africa, about today's announcement that 39 pharmaceutical companies are dropping their lawsuit against the government of South Africa. The drug-makers have been trying to prevent South Africa from importing generic versions of brand name medicines.

The National Oceanic and Atmospheric Administration is forecasting 14 to 21 named storms during the upcoming hurricane season, making it the seventh consecutive above-normal year.

Rice's whales are one of the world's newly discovered whale species – and already one of the most endangered. Protections for the whales in the Gulf of Mexico are not coming fast.