Lexicographers know they're in the hot seat as they confront the changing use of the word "marriage." Linguist Geoff Nunberg says the key to getting the new definition right is to crisply describe everything that's in the category and nothing that isn't.

It's easy to see why a rocket scientist's obituary that led with a mention of her culinary prowess set off accusations of sexism. But food is undeniably a powerful marker of identity, as much or more of a statement of who we are as what we do for a living.

For years, non-baseball experts have been ringing the death knell for this game. But sports commentator Frank Deford says popular team games are so deeply ingrained in our culture that they're here to stay.

Are you one of the last humans who will ever live? Commentator Adam Frank takes us through the famous Doomsday Argument and what it means.

Washington Post deputy editorial page editor Jackson Diehl says that the Iraq War taught him a lot about how we should deal with the civil war in Syria. In an op-ed he argues that without U.S. intervention, Syria could produce "a much worse humanitarian disaster" than Iraq.

Pope Francis surprised many this week by washing the feet of young inmates instead of priests in a grand basilica. The ceremony emulates the way Jesus washed the feet of his twelve disciples. On this Easter weekend, Scott Simon considers the meaning behind Pope Francis' break with tradition.

Audie Cornish speaks with political commentators David Brooks of The New York Times and syndicated columnist Cynthia Tucker. They discuss the Supreme Court's hearing this week of cases concerning California's Proposition 8 and the Defense of Marriage Act.