Terry Gross

Matthew Rosenberg of The New York Times began writing about Gen. Flynn in 2009 in Afghanistan; now he's investigating Flynn's role in Russia's interference in the 2016 presidential election.

Aziz Ansari is in the midst of a whirlwind year. In January, the comic hosted Saturday Night Live the day after President Trump's inauguration — an experience he describes as "one of the most watched stand-up sets I'll ever do in my life, if not the most."

Medical historian Richard Barnett traces the history of dentistry in his new book. He says that prior to the 18th century, the profession was often practiced by charlatans with "big muscles."