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Geneticist Spencer Wells describes how he uses DNA samples to trace our individual origins going back 2,000 generations.

Louise Leakey describes her family's long search for early human remains in Africa, and how unlocking that mystery is the key to understanding our past and our future.

David Christian explains the history of the universe from the big bang, and how humans occupy little more than a millisecond on that cosmic timeline.

For starters: Your voice is too squeaky, too loud; it lacks authority, is grating or obnoxious or unprofessional. Why is talking while female such an offense?

Reporter Giuseppe di Piazza's debut novel, The Four Corners of Palermo, follows an unnamed young reporter during the brutal early days of the mafia's conflict with the Italian government in the 1980s.

A day after Nigeria's announcement last week that a truce had been signed and the release of more than 200 girls secured, 25 more were said to have been kidnapped by extremists.

Many Americans are not scared to reuse old clothes for new Halloween costumes.

Laura Poitras' new film isn't artfully shaped like her other documentaries. But she captures scenes as history is being made — and it will make you look both ways when you're on the street.

Ann Patchett got married and divorced young. To her second husband, she said: "I'll be true, I'll be faithful ... but I don't want to live together." Her book is This Is The Story of a Happy Marriage.

Television images showed students running out of the Marysville, Wash., high school with their hands up. A local hospital said it had received four victims; three of them are in critical condition.