After 17 years underground, the periodical cicadas are ready to resurface. These insects somehow know that 17 seasons have passed, and will be triggered to the surface by the warmth of a spring day… after skipping, yet counting, 16 other springs.
How is this information passed from one generation to the next? What is written into their DNA to give instructions like this? It’s one thing to hibernate for a winter, still another to sit dormant in the soil for 17 years.
Nature holds many secrets. There are many interesting things that happen in the natural world: salmon leave their birthplace in freshwater rivers and come back to the same location after 2 years of living in the salty ocean; monarch butterflies travel yearly from Canada to Mexico; some frogs can freeze for long periods and come back to life after warming up again.
It’s amazing that even today we are discovering new insects, new scientific anomalies, new discoveries about the world we live in, and the incredible mysteries of life. This year, millions of periodical cicadas are going to awake from dormancy after 17 years, molt, mate, and return to the soil for another 17 years. Incredible!
