Science News

If you watch this video normally, the moving circles in the first animation rotate while the shifting dots in the second clip follow a horizontal path. But if you look away and watch the movie out of the corner of your eye, the direction of motion will appear to change. In both cases, the moving objects seem to follow the direction of the background stripes.

Using games and augmented reality, it's possible to control where people go in the real world. John Rula, a graduate student in engineering at northwestern University, and Fabian Bustamante, associate professor of electrical engineering and computer science, came up with a way to get people to go places they might ordinarily not go. The concept is called "crowd soft control," and combines incentives with mobile applications to nudge people in a certain direction.

As we give up our bodies to sleep, sudden twitches escape our brains, causing our arms and legs to jerk. Some people are startled by them, others are embarrassed. Me, I am fascinated by these twitches, known as hypnic jerks. Nobody knows for sure what causes them, but to me they represent the side effects of a hidden battle for control in the brain that happens each night on the cusp between wakefulness and dreams.