Losing the Lemming

Climate change may be responsible for shrinking lemming populations in Norway, a new study shows.
Lemming populations throughout Scandinavia tend to explode naturally every three to five years, causing huge numbers to go in search of food. Occasionally this leads the rodents to jump into water and swim to new pastures—the origin of the myth that lemmings commit mass suicide.
In recent years, however, outbreaks have become a rarity in many parts of Scandinavia.
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