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North American cicadas have life cycles that last for prime numbers of years, putting pressure on the idea that humans created mathematics.

What are Cicadas?

• Classification: Cicadas are insects that belong to the order Hemiptera and the superfamily Cicadoidea.
• Physical Features: Hemipteran insects (also known as true bugs) have piercing-sucking mouthparts and two pairs of wings.
• Life Span: Cicadas spend the majority of their life underground, feeding on plant sap. Once they emerge from the soil, they have a short adult life span of about 2 to 4 weeks.

Habitat:

• Preferred Environment: Cicadas are typically found in natural forests with large trees and are considered canopy dwellers.
• Global Distribution: Cicadas are found on every continent except Antarctica. The highest genetic diversity of cicadas is found in India and Bangladesh, followed by China.

Cicada Emergence and Life Cycle:

• Life Cycle: Cicadas have a complex life cycle, involving long periods of underground development followed by brief adult emergence.
• Periodical Cicadas: There are species of cicadas that emerge in 13-year and 17-year cycles.
• Broods: Initially, 30 broods were categorized based on geography and emergence times, but currently, only about 15 broods remain active due to some broods becoming extinct.
• Unique Phenomenon: In April 2024, a rare event is expected where a trillion cicadas from two different broods will emerge simultaneously in the Midwest and Southeast regions of the United States.

Cicada's underground Development:

• Feeding on Sap: During their underground phase, cicadas feed on the sap of plants.
• Purpose of Long Development: Researchers believe the long development period helps cicadas evade above-ground predators by keeping them hidden in the soil.

Vulnerability after Emergence:

• Emergence Behavior: Once cicadas emerge, they construct a "cicada hut" to shed their nymphal skins, then climb onto nearby trees or vegetation.
• Predator Vulnerability: Adult cicadas are vulnerable to predators such as turtles and other forest creatures because they are clumsy and defenseless, making them easy prey for predators.

Significance of the 2024 Emergence:

• The coinciding emergence of cicadas from different broods (13-year and 17-year cycles) is a rare event that highlights the complexity and mathematical precision behind the cicada life cycle.