Are men and women different on a neurological level? On today's show, a doctor describes the chemical and structural differences between male and female brains. And later on the show, we’ll find out what one woman discovered by disguising herself as a man for a year and half. Plus, James Carville and Paul Begala offer their advice on empowering the Democratic Party. And poet Nick Laird, Zadie Smith’s husband, joins us with his debut novel.