The historical relationship between Blackness and the opera. Also, how Wikipedia beat the odds and became one of the most visited sites on the web. Then, one possible reason why there are gender and racial disparities in STEM majors. Additionally on today's show: how the American Dream and meritocracy can trap people, why thriller book authors clamor for reviewer Ryan Steck's approval, and one man's quest to make outdoor activities accessible for the physically impaired. (AP Photo/Mary Altaffer)