Scientists have for the first time linked high levels of retroviral activity in the central nervous system to some cases of schizophrenia, a severe mental disorder. (p. 228)

Prehistoric human skulls found in Brazil share some traits with modern Africans, leading a Brazilian scientist to theorize that Africans rather than Asians first arrived in the Americas sometime before 11,000 years ago. (p. 212)

Although dyslexia involves a common disruption of reading-related brain activity, the reading performance of people with dyslexia appears to improve if they use a language that has consistent spelling rules. (p. 205)

In a community sample, people suffering from moderate to severe depression exhibited an elevated death rate from heart disease over a 4-year study period, even if they had no discernable heart disease to begin with. (p. 205)

A laboratory experiment finds that people have difficulty remembering words that they have intentionally tried to forget, providing support for Sigmund Freud's controversial concept of repression. (p. 164)

The American Anthropological Association has launched a formal inquiry into the highly publicized allegations of scientific misconduct by anthropologists and others working in South America among the Yanomami Indians. (p. 155)

Researchers contend that neighboring communities of wild chimpanzees develop distinctive styles of mutual grooming to identify fellow group members and foster social solidarity. (p. 155)

College freshmen who greatly overestimate their academic potential feel confident and happy for a while, but as they move toward graduation, these students feel progressively worse about themselves and become less involved with their schoolwork, a new study finds. (p. 148)

For the first time, a person's ability to size up a highly motivated liar has been assessed in a study of police officers viewing videotaped interviews of a murder suspect. (p. 133)

Taiwanese people who donate organs from a deceased family member still support that decision 6 months later, despite frequently experiencing negative consequences related to their culture and religion. (p. 110)

Healthy, older women may be protected against losses of verbal memory that typically occur with age if they receive hormone-replacement therapy. (p. 110)

A fossil analysis indicates that, by about 100,000 years ago, modern humans in the Middle East had hands suited to holding stone tools by attached handles, whereas Neandertals did not. (p. 84)

The human visual system flexibly uses available visual information for guidance as people walk toward targets, according to tests conducted in virtual environments that violate the laws of optics. (p. 72)