Brood X cicadas have a periodical fixed lifespan. That means the adult form only emerges once every set number of years. For Brood X, that’s every 17 years, which means 2021.
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Brood X cicadas have a periodical fixed lifespan. That means the adult form only emerges once every set number of years. For Brood X, that’s every 17 years, which means 2021.
Read More