Take a Walk on the Wild Side. That’s an everyday thing for some newly discovered insects found in a cave in Brazil. Scientist found four species of Brazilian cave insects that dwell in super dry caves that feed on bat guano and possess an “evolutionary novelty.” The girls have a penis and the boys have a vagina-like opening into which lady insect insert their “penis” during mating sessions that last 40 to 70 hours. Talk about a Hard Days Night!

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