Oct. 27 (Bloomberg) -- Take a look at the photos of two
pairs of eyes, and take note: Your heartbeat accelerated when
you looked at the left-hand figure. In fact, it accelerated even
before you could label what is so eerie about the picture.
After some time, you may have recognized the eyes of a
terrified person. The eyes on the right, narrowed by the raised
cheeks of a smile, express happiness -- and they are not nearly
as exciting.