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This hour of Radiolab: communicating across species. We get the story of a rescued whale that may have found a way to say thanks, ask whether dogs feel guilt, and wonder if a successful predator may have fallen in love with a photographer.

An estimated 27 million people worldwide are afflicted with Alzheimer's. On Please Explain – find out what Alzheimer's is all about, and whether there are ways to prevent it or slow its progress. Also: a look at what the Savings & Loan crisis can teach us about our ...

Kurt Andersen talks with writer Paul Theroux about the fierce rivalries that motivate artists to their best — and their worst. Theroux tells why his long friendship with V.S. Naipaul fell apart. We’ll hear a battle of the bands like we’ve never heard before, and watch the heroes of Hong ...