Others are human-produced, like growing and harvesting crops, musical rhythms or economic cycles.Ĭycles also play key roles in Earth’s short-term weather and long-term climate. Some are natural, such as the change of the seasons, annual animal migrations or the circadian rhythms that govern our sleep patterns.
There are hundreds of different types of cycles in our world and in the universe. Our lives literally revolve around cycles: series of events that are repeated regularly in the same order.
