Scientific American January 2003 (tdr).pdf

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1、7,000,000-YEAR-OLDSKULL:ANCESTOR?APE?ORDEADEND?TheNose-TicklingScienceofBubblyJANUARY2003$4.95WWW.SCIAM.COMCOPYRIGHT2002SCIENTIFICAMERICAN,INC.january2003SCIENTIFICAMERICANVolume288Number1THERAPY38NewLightonMedicine38Light-activatedtherapiesBYNICKLANELight-activatedtoxins

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3、nAncestortoCallOurOwnBYKATEWONGIsaseven-million-year-oldcreaturefromChadtheoldestmemberofthehumanlineage?Canweeverreallyknow?NUTRITION64RebuildingtheFoodPyramidBYWALTERC.WILLETTANDMEIRJ.STAMPFERThesimplisticdietaryguideintroducedyearsagoobscuresthetruththatsomefatsareheal

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6、2G3G4G510OntheWeb30H1H2H3H4H512Letters1650,100&150YearsAgo32Innovations18NewsScanCanesta’svirtualkeyboardisoneofthefirstexamplesofanewtypeofremotecontrol.■LittleFDAinterestinanimplantablechip.■NASAlooksagain,reluctantly,tothemoon.34StakingClaims■Micromarketingtofood-allerg

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8、mbers:HeatingtheU.S.home.whatsciencecandotohelpthedevelopingworld.■DataPoints:Nursesneeded,stat!