James Baldwin Analyzes Racism.

In his new book, Gods of the Upper Air, Charles King tells the story of Franz Boas, Margaret Mead and the other 20th century anthropologists who challenged outdated notions of race, class and gender.

With all our texting, tweeting and social media posting, billions of people are using typed words for the kind everyday communication that used to happen more often in conversation. A new book argues that we’ve created a unique new language to reproduce the shades of meaning that we used to convey verbally. Our linguist Geoff Nunberg reflects on the new rules of language that he calls chat-speak.

Underwater explorer and photographer Jill Heinerth has dived into unmapped caves deep in the earth, and beneath a giant iceberg. She's seen hidden creatures old as dinosaurs, and witnessed scenes of surreal beauty. Her work is so dangerous, over a hundred of her friends and colleagues have died in caves. She talks about the risks and rewards of her work.