Podcast: Cancer-detecting pigeons, a toad-killing fungus, and more

How have biologists wiped out a toad-killing fungus? Can pigeons spot cancer as well as human experts? And what is behind the recent breakthrough in complexity theory? 24小时娱乐在线's Catherine Matacic and Sarah Crespi chat about these stories and more. Plus, Jennifer Long explains how scientists have engineered human vocal cords.