Hour 2: Viruses from the flu to HIV have threatened humanity over the years. But those same diseases have also contributed to human evolution. We’ll learn this hour about how viruses can actually benefit us – and about new efforts to tame them – with Dr. Nathan Wolfe. He’s the author of The Viral Storm: The Dawn of a New Pandemic Age (St. Martin’s Griffin). Dr. Wolfe speaks March 20 at the Perot Museum of Nature and Science during the Austin College Global Outreach GO! Forum.