Comedian Brody Stevens, Stupid Condors, and Inside Our Guts

We try to ruin your July 4th picnics with a quick peak inside the human digestive system with science writer Mary Roach. Then we talk with comedian Brody Stevens about his mental breakdown and how it affected his career. The New Yorker’s Elizabeth Kolbert says the earth is currently going through an extinction period. And we find out why an attempt to save condors is actually making the birds stupid.