Many people look into the northern sky at night and happen to spot a strange, yet majestical illumination. This natural phenomenon has perplexed and puzzled some of the world's greatest minds for many years. It's known as Aurora Borealis, which means "northern lights" in Latin. ...

The definition of acid rain is rain containing acids that form in the atmosphere and combine with water, regardless of the cause. Pollution, volcanic eruptions, power-generating plants, forest fires, and even lightning bolts are causes of acid rain. Acidic rain has been measured in several locations...