Wednesday morning, 7:15 AM. The sun struggles to break through the clouds scattered here and there in the dawn sky. In just a few minutes, over to the east, it'll suddenly set the horizon ablaze, and I'll be able to turn off the headlamp lighting my way along the cross country ski trail. In less than two hours, I'll be back at work, at home in front of my computer. What makes a sane person leave the warmth of their bed so early, brave the biting cold, all to to get lost in the woods at this time of night