Trees talk to each other, and even form alliances with other trees or other species. Some are incredibly old — the root mass of aspens might live 100,000 years. In this hour, we explore the science and history of trees.More
A conversation with renowned biologist Jared Diamond, best known for his Pulitzer Prize-winning book “Guns, Germs and Steel.” His new book is “The World Until Yesterday: What Can We Learn from Traditional Societies?”More
