Online news editor David Grimm shares stories on 66-million-year-old Tyrannosaurus rex tracks, a signature of human consciousness, and a second try at domesticating cats. Mathieu Ossendrijver joins host Sarah Crespi to discuss newly translated Babylonian tablets that extend the roots of calculus all the way back to between 350 B.C.E. to 50 B.C.E. Read the related research in Science. Learn more about your ad choices. Visit megaphone.fm/adchoices

Online News Editor David Grimm shares stories on studying marijuana use in teenage twins, building a better maze for psychological experiments, and a close inspection of the bugs in our homes. Science News Writer Eric Hand joins host Sarah Crespi to discuss the potential for a ninth planet in the solar system that circles the sun just once every 15,000 years.  [Image: Gilles San Martin/CC BY-SA 2.0] Learn more about your ad choices. Visit megaphone.fm/adchoices

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

What stripped an unusual black hole of its stars? Can a bipolar drug change ant behavior? And did dinosaurs dance to woo mates? Science's Online News Editor David Grimm chats about these stories and more with Science's Multimedia Producer Sarah Crespi. Plus,Science's Emily Underwood wades into the muddled world of migraine research, and Jessica Metcalf talks about using modern microbial means to track mammalian decomposition. Learn more about your ad choices. Visit megaphone.fm/adchoices

Robert Coontz discusses Science's 2015 Breakthrough of the Year and runners-up, from visions of Pluto to the discovery of a previously unknown human species. Online news editor David Grimm reviews the top news stories of the past year with Sarah Crespi. Hosted by Susanne Bard. Learn more about your ad choices. Visit megaphone.fm/adchoices

Brenden Lake discusses a new computational model that rivals the human ability to learn new concepts based on just a single example; David Grimm talks about attracting cockroaches, searching for habitable planets, and looking to street dogs to learn about domestication. Hosted by Susanne Bard. [Img: Rodrigo Basaure CC BY 2.0, via flickr] Learn more about your ad choices. Visit megaphone.fm/adchoices

Paul O'Toole discusses what happens to our gut microbes as we age; David Grimm talks about competent grandmas, our tilted moon, and gender in the brain. Hosted by Susanne Bard. [Img: Dhinakaran Gajavarathan CC BY 2.0, via flickr] Learn more about your ad choices. Visit megaphone.fm/adchoices

Joshua Blumenstock discusses patterns of mobile phone use as a source of "big data" about wealth and poverty in developing countries; David Grimm talks about gene drives, helpful parasites, and electric roses. Hosted by Sarah Crespi. [Img: A.A. JAMES] Learn more about your ad choices. Visit megaphone.fm/adchoices

Jennifer Long explains how scientists have engineered human vocal cords; Catherine Matacic talks about vanquishing a deadly amphibian fungus, pigeons that spot cancer, and more. Hosted by Susanne Bard. [Img: Jaime Bosch MNCN-CSIC] Learn more about your ad choices. Visit megaphone.fm/adchoices

Lauren Sallan discusses the consequences of a mass extinction event 359 million years ago on vertebrate body size; David Grimm talks about grandma's immune system, gambling on studies, and killer genes. Hosted by Sarah Crespi. [Img: Robert Nicholls] Learn more about your ad choices. Visit megaphone.fm/adchoices