Our ancestors didn’t have televisions or even electricity. When it got dark, candles may have come out for a while, but before too long it was “lights out” for most people. With the advent of technology, nature no longer has to dictate our sleeping schedule, though perhaps it still should. “…the mice got fatter, showed less mental flexibility, and were more impulsive.” A new paper out of Dr. Bruce S. McEwen’s Rockefeller University lab looked at the effects of artificial lighting changing our 24-hour circadian rhythm. Researchers housed mice in an artificial environment with a 20-hour “day” rather than our…