The Little Ice Age was a period of global cooling that occurred between 1550 and 1850 AD. It was characterized by three particularly cold intervals separated by slight warming periods. Potential causes included changes in solar activity, volcanic eruptions, ocean circulation patterns, and decreases in human population. During this time, Europe and North America experienced extreme winters that destroyed farms and villages. Glaciers advanced significantly and temperatures dropped worldwide, resulting in widespread famine and cultural disruption.