Recent quotes:

Lack of sleep intensifies anger, impairs adaptation to frustrating circumstances -- ScienceDaily

"In general, anger was substantially higher for those who were sleep restricted," Krizan said. "We manipulated how annoying the noise was during the task and as expected, people reported more anger when the noise was more unpleasant. When sleep was restricted, people reported even more anger, regardless of the noise."

The military’s obsession with energy drinks is contributing to PTSD, study finds

What the authors found was that over the course of the month leading up to the survey, more than 75 percent of soldiers consumed energy drinks. More surprising, however, was that 16 percent “of soldiers in this study reported continuing to consume two or more energy drinks per day in the post-deployment period," the authors wrote. High energy drink use, which was classified as consuming two or more drinks per day, was significantly associated with those survey respondents who reported mental health problems, anger-related behaviors and fatigue, the authors found. Those consuming less than one energy drink per week reported these symptoms at a significantly lower rate.

Circadian Clock That Controls Daily Aggression Rhythms Located - Neuroscience News

“The mice were more likely to be aggressive in the early evening around lights out, and least aggressive in the early morning, around lights on,” Saper said. “It looks like aggressiveness builds up in mice during the lights on period, and reaches a peak around the end of the light period.”