Relax! No day nap or eight-hour sleep for our ancestors either
Our ancestors stayed up late into the evening, averaging less than 6.5 hours of sleep and rarely took naps.
Oct 16, 2015, 15:52 PM IST
Our ancestors stayed up late into the evening, averaging less than 6.5 hours of sleep and rarely took naps.
Oct 16, 2015, 15:52 PM IST