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Health & MedicineWhere funny faces come from
Making a face might have helped human ancestors survive.
By Amy Maxmen -
Health & MedicineGirl athletes’ energy crisis
Lack of regular periods in teenage female athletes stems from a hormone imbalance arising from inadequate energy intake.
By Nathan Seppa -
AnimalsSqueaky chimp sex, or not
Female chimps tend toward silent sex when the other girls could overhear.
By Susan Milius -
SpaceRocky cores form first
A theorist says new extrasolar findings prove that the standard model of planet formation is correct.
By Ron Cowen -
Health & MedicineCooking cancer cells
A new technique combining antibodies, carbon nanotubes and near-infrared light holds promise for treating malignancies, scientists report.