What kind of hat tops the highest northern and southern latitudes, never rests on a human head, and shrinks when global temperatures rise?
An ice cap
An 'ice cap' is a high-latitude glacier body, playing on the double meaning of 'cap' as headwear.
About this riddle
Wordplay riddles depend on how words look and sound. Watch for double meanings, hidden words and letters you can move or remove.
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