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The Roaring Forties was created in 1982.
The Flaming Forties was created on 1924-12-21.
People in their forties are commonly referred to as "middle-aged."
There are 12 1/10 forties in 484 (484/40 = 12.1).
The term, roaring forties, refers to the latitudes between 40°S and 50°S