They also found that a healthy diet -- low fat and high fruit and fiber intake -- and exercise were linked to fewer gastrointestinal symptoms. But that was only part of the answer. After a more sophisticated analysis, one factor emerged as the most important predictor of gut symptoms: exercise.
On April 21, 2008, lights were again reported over North Phoenix by local residents. According to witnesses, the lights formed a vertical line, then spread apart and made a diamond shape. The lights also formed a U-shape at one time.
As with most of Arizona, Phoenix does not observe daylight saving time. In 1973, Governor Jack Williams argued to the U.S. Congress that due to air conditioning units not being used as often in the morning on standard time, energy use would increase in the evening should the state observe daylight saving time.