Oh, the light! The autumn light! Was there anything more glorious than a fall day

Now science is finding that our manhandling of light and time is making us sick.

Women who work at night, out of sync with the light, have recently been shown to have higher rates of breast cancer

Being out of phase with the natural day-night cycle can take a big toll, causing fatigue, mood disturbances and depression. But for millions of Americans, these symptoms become even worse in winter

"We've deseasonalized ourselves," said Thomas Wehr, a psychiatrist at the National Institute of Mental Health

Artificial illumination is fooling the body's biological clock into releasing key wakefulness hormones at the wrong times, contributing to seasonal fatigue and depression.