From medicine to the movies, the horrifying to the holy, and history to the present day -- we're kinda obsessed with blood. This hour, we consider the power and magic of the red liquid that runs through our veins.Season 12 Episode 1 Timeline on Pop culture.Guests include: Scott Carney, Edward Dolnick, Gilbert Gaul, Inger Hägglund Tornberg, Joseph Lovett, Laurel Reuter, Charles Rouault, James Shapiro, Douglas Starr, Christien Tinsely, Peter Tomasulo, Saul Villeda and Amy WagersWant more blood? Check out Radio Lab's blood episode & extras.