Podcast: Gambling on science, the genes you can’t do without, and more

Can grandmothers pass immunity to their grandchildren? Does betting on science reveal which studies are worth their salt? And what are the 3000-odd genes you just can’t do without? 24小时娱乐在线's Online 24小时娱乐在线 Editor David Grimm chats about these stories and more with 24小时娱乐在线's Sarah Crespi. Plus, Lauren Sallan discusses the consequences of a mass extinction event 359 million years ago on vertebrate body size.