THESCIENCEOFSLEEP“Wearenowlivinginaworldwidetestofthenegativeconsequencesofsleepdeprivation.”ROBERTSTICKGOLD,HARVARDMEDICALSCHOOL08.2018toyota.com/camryNATIONALGEOGRAPHICPROOFEMBARKEXPLORECONTENTSAUGUST201836ALSO•AncientBloodsuckers•ChillingOutonMars•Migration’sArtifactsTHROUGHTHELENSAnImage’sImpactTheysharedaphototowarnofclimatethreatstowildlifebutthemes-sagegotsidetracked.BYCRISTINAMITTERMEIERATLASCoralReefLossRisingseasurfacetem-peraturescausecoralbleachinganddeathatlandmarksliketheGreatBarrierReef.BYLAURENE.JAMESALSO•OutofEdenWalk:Update•DescentIntoaVolcanoWithSulfurMinersEndangeredBirdsWhenone-of-a-kindspeciesareonthevergeofextinction,whatpersuadespeopletosavethem?Maybetherightimages.BYJONATHANBAILLIEPHOTOGRAPHSBYTIMFLACH817OntheCoverWileWennman,seven,ofNacka,Sweden,likestofallasleepwiththelighton,sayshisfather,Magnus—apho-tographerwho’straveledtheworldtocapturehowandwherepeoplesleep.MAGNUSWENNMANTHEBIGIDEAAreWeasAwfulasWeActOnline?It’snothumannaturethatsparksmeanpostsandtweets.Butevolu-tiondoesplayarole.BYAGUSTÍNFUENTESDATASHEETEarth-FriendlyTransitTransportationsystemshelpcitiesstempollu-tion,increaselivability.BYRYANMORRISANDKELSEYNOWAKOWSKIFEATURESTheScienceofSleepThoughslumbermaylooklikeanidlestate,newsciencerevealsthatourbrainsaren’tlessactivewhenwesleep—justdifferentlyactive.Onagoodnight,we’llcyclerepeatedlythroughseveralsleepstages,eachwithdistinctqualitiesandpurpose.BYMICHAELFINKELPHOTOGRAPHSBYMAGNUSWENNMAN......................................P.40PoisoningAfricaTostoppredatorsthatkilllivestock,Kenya’sherdersputouttoxicbait—andenduppoi-soningtheecosystem.BYEDWINDOBBPHOTOGRAPHSBYCHARLIEHAMILTONJAMES.......................................P.78HistoricWhalersRemainsofaBasquegalleonshedlightonwhalers’lifeandwork.BYFERNANDOG.BAPTISTA.....................................P.102ButterflyCatchersWingedbeautiesenduponablackmarket.BYMATTHEWTEAGUEPHOTOGRAPHSBYEVGENIAARBUGAEVA......................................P.112DISPATCHESHealthCareCrisisY...
