Podcast: Wounded mammoths, brave birds, bright bulbs, and more

In this week’s podcast, David Grimm talks about brave birds, building a brighter light bulb, and changing our voice to influence our emotions. Plus, Ann Gibbons discusses the implications of a butchered 45,000-year-old mammoth found in the Siberian arctic for human migration. Read the related research in Science. [IMG: Dmitry Bogdanov] Learn more about your ad choices. Visit megaphone.fm/adchoices