[cnn-photo-caption image=http://i2.cdn.turner.com/cnn/2009/images/07/09/woman.sick.bed.art.jpg caption="Some people who appear to have insomnia are biologically night owls, one expert says."] (CNN) – If you have a hard time crawling out of bed in the morning, it could be that your body is biologically programmed to start the day later. Experts say a spectrum of natural sleeping and waking rhythms … Continue reading Study: Night owls may benefit from evening strength