Podcast: Dingoes, Neandertals, and Iron-Caused Ice Ages By David Grimm, Sarah CrespiApr. 3, 2014 , 2:30 PM Is Australia’s dingo a dog, a wolf, or neither? Did Neandertals turn Europeans into “fatheads”? And did airborne iron cause past ice ages? Science's Online News Editor David Grimm chats about these stories and more with Science's Sarah Crespi.