On the genetic underpinnings of another very interesting area of individual psychological differences:


Scientists Identify Genetic Difference Between Early Risers And Late Sleepers
www.iflscience.com
Do you prefer getting up at dawn, or staying awake to the small hours? Your answer to this probably depends on your age, but as is becoming increasingly clear, it also depends on your genes. Being an early riser or a late nighter has been seen to run in families and shows a strong genetic link. And���