Terry Gross

The poet describes his new book — about the death of his father and the birth of his son — as having a blues sensibility. "There are moments of humor even in the sorrow," he says.

The astrophysicist says that participating in a "great unfolding of a cosmic story" should make us feel large, not small. This spring, Tyson hosts a TV series called Cosmos: A Space-Time Odyssey.

New York Times correspondent David Kirkpatrick spent months on the ground in Benghazi, Libya, trying to get to the bottom of the deadly Sept. 11, 2012 attack on the U.S. Consulate.