how many ice ages have there been?

best answer
Scientifically speak the world experiences an ice age any time ice sheets are present over the extreme points of the northern and southern hemispheres. According to this definition the earth is currently in the midst of an ice age and has experienced at least five over the course of history. This article takes a closer look at each of these 5 ice ages Quaternary Karoo Andean-Saharan Cryogenian and Huronian.