Now a study finds that when psychopaths see images of people in pain, there's a pattern of activity in their brains that is quite different from brain activity in non-psychopaths.
It was a huge milestone in the development of smartphones, which are now owned by a majority of American adults and are increasingly common across the globe.
Such concerns are real and widespread-in August South Africa followed France's lead and slapped a moratorium on fracking. More studies will be needed before the public is reassured.
When we were in school he was a famous unconventional, and self-indulgent old-style intellective. Now he is more unrestrained, distinctive, and not punctilious.
Norman Rockwell, a 20th-century artist, never painted Boy Swiping Finger on Screen, and our own vision of a perfect childhood has never been adjusted to accommodate that now-common scene.