Ice Age

The Ice Age was the last galacial period in which many parts of the world was covered in ice. Superman once encountered an Iceman, who was going to use an ice bomb capable of plunging the entire Earth into another Ice Age. Thankfully, Superman stopped him, and sent him to an asteroid and allowed the bomb to be detonated there, giving him a happy frozen home.

Mentioned
The New Adventures of Superman
 * The Abominable Iceman