On April 8, a total solar eclipse will be visible in many parts of the world. After the total eclipse occurs, up to 100 trillion periodical cicadas are expected to emerge from hibernation in the United States, creating a rare sight.
Periodical cicadas (Magicicada) are one of the longest-lived insects in nature. They are divided into two main groups:
Brood XIX, or Great Southern Brood, which emerges every 13 years, is the largest periodical cicada colony, spanning the southeastern United States. Brood Northern Illinois, or Brood XIII, emerges every 17 years.
The cicadas are expected to begin emerging in late April. They will use their front legs to dig a hole and emerge from the ground. They will then seek a safe place to complete their growth, lay their next generation, and die.
The two groups of cicadas will "wake up" at the same time, a rare event known as a dual emergence. According to experts, the last time this coincidence happened was in 1803, when Thomas Jefferson was president of the United States.
According to previous historical records, when cicadas emerged, they would cover the fields and houses in their path. The noise they made was comparable to that of a jet engine.
It is estimated that the number of Brood XIX and Brood XIII cicadas emerging at the same time this year could be in the hundreds of trillions - or even quadrillions.
Each cicada is about 2.5 cm long, with only 1,000 billion cicadas, they could travel more than 25.3 million km if lined up end to end, 33 times the distance from the Moon to Earth.
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