New research suggests older adults may have less activity in the area of the brain that processes risk and subtle danger. Another possible reason older adults don't pick up on warning signs is an increasing bias against negativity.
A study in Newark, N.J., found that homicides committed over a quarter century spread out very much like an infectious disease epidemic. Using this information, cities might be able to predict when and where murders will occur.
A historian places Thomas Edison's incandescent light bulb in the context of a period of intense technological creativity in the U.S. More than any other invention, he argues, electric light ushered in modernity.
NASA's Voyager 1 has reached the final frontier of our solar system. Audie Cornish talks with Ed Stone, chief scientist of the Voyager mission, about the spacecraft's discovery of a magnetic highway at the very outer edge of the solar system.
Personality disorders represent some of the most challenging and mysterious problems in the field of mental health. People suffering from antisocial personality disorder or obsessive compulsive personality disorder are often misdiagnosed. The effects on the sufferers and their families can be wrenching.
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