A study finds that three-year-old children know a lot more than we might give them credit for. Christie Nicholson reports

We tend to overestimate how rare our names are, perhaps in an effort to preserve a sense of being special. Christie Nicholson reports

A recent study finds that we can instill our emotions in others through chemical signals delivered by scent. Christie Nicholson reports

A recent study finds that we tend to recognize words associated with positive thoughts faster after we've had some coffee. Christie Nicholson reports

Two or more drinks cut REM sleep, which is important for memory and health. Katherine Harmon reports

A new study finds that diapers, both disposable and cloth, impede walking for babies. Christie Nicholson reports

New smart phone apps that purport to assess patients' skin lesions as cancer or not are unreliable, according to a new study. Katherine Harmon reports

A recent study shows that images of thin women do in fact alter women's body preferences. Christie Nicholson reports

Michael C. Hall, of TV's Dexter, talks about psychopathy with psychologist Kevin Dutton, author of The Wisdom of Psychopaths

The errors known as surgical "never events," which are never supposed to happen, still occur some 4,000 times annually in the U.S. Katherine Harmon reports