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Health & MedicineHis-and-Her Hunger Pangs: Gender affects the brain’s response to food
Men's and women's brains react differently to hunger, as well as to satiation.
By Kristin Cobb -
PhysicsHeightened Resistance: Sharper shaft points to smaller bits
Scientists have exploited a method for detecting the orientations of magnetic fields to achieve a remarkable leap in detector sensitivity.
By Peter Weiss -
EarthTeenage Holdup: Pollution may delay puberty
A new study of adolescents suggests that widespread environmental pollutants such as PCBs and dioxins may delay sexual development.
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Materials ScienceX Rays to Go: Carbon nanotubes could shrink machines
A new type of X-ray machine operates at room temperature by producing X-ray-generating electrons with carbon nanotubes instead of traditional heated metal filaments.