Podcast: A Mysterious Extinction, a Friendly Fungus, and What Your 'Hello' Says About You

Why did New Zealand’s moas go extinct? Can a friendly fungus protect us from disease? And what does your “hello” say about you? Science's Online News Editor David Grimm chats about these stories and more with Science's Sarah Crespi.

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A 3D plot from a model of the Ebola risk faced at different West African regions over time.
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