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And should these systems refer to the rising cave system, prove to be reserved exclusively for females, it would indicate a symbolic, more of a more of a practice, more of a unique and modern human. Or there's another take on this as well, though the population of age and already may have been a highly isolated population where male specific, male-agenant, Y gene mutated or was needed entirely. Which has been seen, although it's been seen rarely in some modern human population. This means that males might have been present but their teeth held go to saccharable male signature.