For centuries, massive teeth found along coastlines puzzled scientists and naturalists. Researchers later discovered these ...

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Thousands of meters below the ocean's surface lurk some gigantic creatures, much larger than their shallow-water brethren. Scientists have a few hunches for why this happens, but the debate continues.

Regina Barber and Rachel Carlson of Short Wave talk about endangered eagles in Japan, the lifestyles of deep-living ocean creatures and the longevity secrets of human 'SuperAgers,' aged 80 and older.