With the debate about global warming still raging it might come as a surprise to many to discover that we are still living in an ice age. While the climate is without a doubt warming around the globe, and the glacial regions are disappearing practically before our eyes, how could we possibly be in an ice age? First we will explain how ice ages and their opposites, interglacial periods occur.
Both glacial and interglacial periods coincide with normal cyclic changes in the Earth’s orbit around the Sun. There are three orbital changes tat can contribute to these changes.