Millions of years ago, our Earth was, more or less, warm. The temperature difference between the poles and the equator was considerably smaller than now. The United States had climates similar to that of Cuba, for example. There was even vegetation taking root in the Antarctic. But how does something like this happen, how did this warm climate turn into a global tundra? Generally speaking, an Ice Age comes about in a very simple way; essentially, this occurs when the Earth as a whole has cooled considerably for a substantial amount of time, thus producing ice sheets, snowy conditions, colder temperatures, etc. However, a snow-covered area reflects the sun’s light more than that of an area free of any extra layer of precipitation, and so the