Environment
Longer ‘penis’ drives evolution of bigger brains in female fish
Experiments that grew mosquito fish with longer sperm-delivery organs led to females with larger brains – possibly to better avoid male harassment
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Experiments that grew mosquito fish with longer sperm-delivery organs led to females with larger brains – possibly to better avoid male harassment
Studies in rats suggest that our earliest memories may lie dormant in the brain, ready to resurface given the right triggers