For thousands of years, people have been convinced that the weather and the position of the moon can wreak profound havoc on human behavior. This belief continues in the modern day, with numerous law enforcement officers, medical professionals and more swearing people act strangely during the full moon. Additionally, science shows certain environmental factors, such as an extended lack of sunlight, can spark measurable changes in mood. So what's the truth here? Can the weather really make people go crazy?