Podcast: A Mysterious Extinction, a Friendly Fungus, and What Your 'Hello' Says About You By David Grimm, Sarah CrespiMar. 20, 2014 , 12:45 PM 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. Listen to the full Science podcast. Hear more podcasts.