Related Clues:
- Cooling-off period
- Glacial period
- Frigid period
- Pleistocene Epoch
- Time period that shaped the Great Lakes
- Time of the mammoths
- Geological cold spell
- The Pleistocene Epoch, familiarly
- Big chill of long ago
- Global warming threat, some say
- Movie with the tag line "The Coolest Event in 16,000 Years"
- Old cold time
- Cooling-off period?
- When the mastodon roamed
- 2002 film whose sequel is subtitled "The Meltdown"