A new study has uncovered fossil evidence that suggests insects may be nocturnal much earlier than previously thought. An international team of researchers used specimens of the earliest known insect in the fossil record, Archaeorthoptera, to analyze the ocelli, or light-sensing organs, of these ancient insects. The team found that the ocelli were adapted to low-light conditions, indicating that these insects may have been active during the night. This discovery provides new insight into the evolution of night-time behavior in insects, a behavior that is still common among many species today.

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source: Phys.org