Upgrade the framed family photos that have been hanging in your parents’ home for the past 600 years. With today's Groupon to ADC Photography, $20 gets you an in-studio session (a $150 value) and an 8x10 print (a $65 value), plus 25% off any additional a la carte prints (discount not valid for collections). Now that you aren’t riddled with acne or plagued with a six-year-old’s gummy smile, split the cost with your sibs and surprise your folks with a more up-to-date snapshot just in time for the holidays.In 1978, amateur bat photographer Gregory Hansen was in his front yard one night when a mysterious white orb appeared in the sky over his home. Diverting his attention from a particularly active nest of eptesicus fuscus, he began photographing the orb, which made no attempt to flee or conceal itself. Hansen continued to document the orb as it reappeared over his house, each night shrinking slightly “as though passing slowly into the spirit world,” Hansen observed. On particularly cloudy nights, the orb would not be present, prompting Hansen to speculate that ghosts may be allergic to thunder.