Cold old time (3,3)
I believe the answer is:
ice age
(Other definitions for ice age that I've seen before include "'When glaciers covered the earth (3,3)'" , "Glacial period" , "Cold period for Earth" , "Very cold epoch" , "Freezing era" .)
I believe the answer is:
ice age
(Other definitions for ice age that I've seen before include "'When glaciers covered the earth (3,3)'" , "Glacial period" , "Cold period for Earth" , "Very cold epoch" , "Freezing era" .)