Fossil clues indicate that Stone Age humans ate a considerable amount of seafood, giving them a broader and more resilient diet than that of Neandertals. (p. 376)

Mexico may have served as a center of early plant domestication in the Americas, according to researchers who have excavated a site near Mexico's Gulf Coast. (p. 376)

A 60-year study indicates that middle-aged men can exert a considerable amount of personal control over their eventual physical and mental health as seniors. (p. 373)

Teenagers diagnosed with attention-deficit hyperactivity disorder may reap substantial academic benefits from treatment that combines behavioral training with low doses of stimulant medication. (p. 343)

People who, as young adults, describe their lives using a variety of terms for positive emotions live substantially longer than those who express little positive emotion, according to a long-term study of Catholic nuns. (p. 324)

Refugees interviewed in camps in Nepal exhibit post-traumatic stress disorder and other mental ailments, especially if they have survived torture in their native country. (p. 310)

Children in two-parent families spend more time with their mothers and fathers now than they did 20 years ago. (p. 312)

Mammal species exhibit basic types of brain design from which they have evolved a wide array of brain sizes, according to a new analysis. (p. 312)

A substantial proportion of children in grades 6 through 10 report bullying other children or being bullied themselves. (p. 280)

Brain areas considered crucial for understanding language may also play an important role in music perception. (p. 280)

Layers of hardened volcanic ash on the Indonesian island of Java have yielded evidence that Homo erectus reached eastern Asia by 1.5 million years ago and remained there until about 1 million years ago. (p. 246)

The skeletal diversity that many scientists use to divide up fossil species in our evolutionary past masks a genetic unity that actually encompassed relatively few species, contend researchers in an opposing camp. (p. 232)