News of the development comes from National Journal in a lengthy article that debuted late last week.

The article, which manages to reach nearly 6,000 words, cites several studies, including one conducted at the University of California, San Diego. For the five-year study, researchers hooked 164 human subjects up to a polysomnography machine (which features a brain scanner, eye trackers, breathing sensors and much else). They found that black participants and white participants experienced sleep differently. In a nutshell, the white study subjects achieved slow-wave sleep — which is the really good kind — about 20 percent of the time. Black subjects only reached this quality level 15 percent of the time.