scorecardIn 1875, the largest locust plague in history turned US skies black, when a swarm 1,800 miles long and 110 miles wide flew over the Midwest. Scientists believe there were trillions of "Rocky Mountain Locusts," a type of insect that's now extinct.
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  4. Swarms of locusts forced Somalia to declare a national emergency. Skin-crawling photos show how menacing their plagues can be.
  5. In 1875, the largest locust plague in history turned US skies black, when a swarm 1,800 miles long and 110 miles wide flew over the Midwest. Scientists believe there were trillions of "Rocky Mountain Locusts," a type of insect that's now extinct.

In 1875, the largest locust plague in history turned US skies black, when a swarm 1,800 miles long and 110 miles wide flew over the Midwest. Scientists believe there were trillions of "Rocky Mountain Locusts," a type of insect that's now extinct.

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