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高中外研版英语教材选修8课文

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高中外研版英语教材选修8课文Module1Antarctica:thelastcontinent1______________________________AntarcticaisthecoldestplaceonEarth.It’salsothedriest.Withannualrainfallclosetozero,Antarcticaistechnicallyadesert.Coveringabout14millionsquarekilometresaroundtheSouthPole,itisthefifthlargestconti...

高中外研版英语教材选修8课文
Module1Antarctica:thelastcontinent1______________________________AntarcticaisthecoldestplaceonEarth.It’salsothedriest.Withannualrainfallclosetozero,Antarcticaistechnicallyadesert.Coveringabout14millionsquarekilometresaroundtheSouthPole,itisthefifthlargestcontinentintheworld.Ahighmountainrange,theTrans-Antarcticrange,runsfromeasttowest,cuttingthecontinentintwo.Therearevolcanoestoo,buttheyarenotveryactive.Antarcticaholds90%oftheworld’sice,andmostofitsfreshwater(70%)isinafrozenstate,ofcourse.98%ofthesurfaceiscoveredpermanentlyintheicecap.Onaverageitistwokilometresthick,butinsomeplacesitreachesadepthoffivekilometres.Strongwindsdrivenbygravityblowfromthepoletothecoastline,whileotherwindsblowroundthecoast.Itisdifficulttoimagineamoreinhospitableplace.2______________________________YetAntarcticaisfullofwildlife,whichhasadaptedtoitsextremeconditions.Therearedifferenttypesofpenguins,flyingbirds,seals,andwhales.ButthelongAntarcticwinternight,whichlastsfor182days(thelongestperiodofcontinuousdarknessonearth),aswellastheextremecoldandlackofrainfall,meansthatfewtypesofplantscansurvivethere.Onlytwotypesoffloweringplantsarefound,whiletherearenotreesonthelargecontinent.Therestoftheplantsaremadeupofmosses,algaeandlichen.Someformsofalgaehaveadaptedtogrowonice.3______________________________Mostoftheicehasbeenthereforthousandsofyears.Asaresult,ithasbecomeawindowonthepast,andcangiveresearcherslotsofusefulinformation.Gasesandminerals,intheformofvolcanicdusttrappedintheice,cantellusalotaboutwhattheworldsclimatewaslikeinpastages.Antarcticrocksarealsoveryimportantforresearch.Mostofthemaremeteoritesfromouterspace.Onerock,knownusthe“Alien”rock,maycontainevidenceofextra-terrestriallife.SincemostAntarcticrocksarcdarkincolour,theystandoutagainstthewhilebackgroundandareeasytoidentifyandcollect.4______________________________Antarcticawasthelastcontinenttobediscovered.ButmorethantwothousandyearsagoGreekgeographersbelievedthattherewasalargelandmassinthesouthwhichbalancedthelandinthenorth.TheycalleditAnti-Arktikos,orAntarctica:theoppositeofArctic.WhenEuropeansdiscoveredthecontinentofAmericainthe15thcentury,thegreatageofexplorationbegan.However,progresstotheSouthPolewasslow.Notuntilthelate18thcenturydidtheBritishexplorerJamesCookcrosstheAntarcticCircle,butheneversawland.Thenin1895,aNorwegiancalledCarstensBorchgrevinkbecamethefirstmantosetfootontheAntarcticmainland.Theracetothepolehadbegun.Itwasfinallyreachedon11thDecember,1911bytheNorwegianRoaldAmundsen.5______________________________TodayscientistsfrommanycountriestraveltoAntarcticatostudyitsresources.Aspiritofinternationalfriendshiphasreplacedtherivalrythatexistedbetweenmanyoftheearlierexplorers.In1961,atreatysignedby12countries,includingBritain,France,andtheUSA,madeAntarcticatheworld'sbiggestnaturereserve.Theaimofthetreatyistopreventthecommercialandmilitaryuseofthecontinent.Inparticular,itaimstokeepAntarcticafreefromnucleartestsandradioactivewaste;topromoteinternationalscientificprojects;andtoendargumentsaboutwhoownstheland.Todaycountriesrepresenting80%oftheworld’spopulationhavesignedthetreaty.Antarcticahasbecomeperhapsthemostsuccessfulsymbolofman’seffortstoworktogetherforprogressandpeace.HowFailureBecameSuccessOn8thAugust,1914,27menwhohadrepliedtoanadvertisementinTheTimesboardedashipleavingfortheAntarctic.ThenameoftheshipwastheEnduranceandthecaptainwasanIrishmancalledErnestShackleton.TheaimofthejourneywastocrossthefrozencontinentviatheSouthPole-ajourneyof1,800miles.Shackletonthoughtthejourneywouldlastsixmonths.Butwhenlandcameintosight,theEndurancebecametrappedintheiceandbegantobreakup.ShackletonandhismenwatchedtheEndurancesinkintotheicysea.Theythenheadednorth,pullingthreelifeboatsbehindthem.Aftersixdays,badweatherforcedthemtogiveupandthemensetupcamponasheetoficewhichbeganslowlymovingacrosstheAntarcticCircle.Theysurvivedontheiceforfivemonths.Then,on16thApril,1915,Shackletonsawland.ItwasElephantIsland-alargerockwithnothinggrowingonit,butmuchbetterthanafloatingpieceofice.Whentheyreachedtheisland,Shackletoncameupwithanidea-itwasariskbuthewouldhavetotakeit.Heandfivemenwouldtakeoneofthelifeboats,andsail800milestoSouthGeorgia,wheretherewasapermanentcamp.Theycouldthenreturntorescuetherestofthemen.IttookShackleton17daystoreachSouthGeorgia.Unfortunatelyhelandedonthewrongsideoftheisland,andhadtowalk36hoursovermountainstoreachthecamp.Thewhalehuntersatthecampcouldn’tbelievetheireyeswhentheysawthesixmenwalkingdownfromthemountains.Shackletonkepthispromise.Morethanthreemonthslater,hereturnedtoElephantIslandtorescuethecrewhehadbeenforcedtoabandon.Hehadfailedtoreachthepole-buthehadsavedthelivesofallhismen.WelcometotheSouthPoles!SouthPoles?Howmanyarethere?Infact,therearethreeSouthPoles:aceremonialPole,whichisonthemovingglacier,ageographicalortruePole,andamagneticPole.whichchangesitspositionaccordingtothemovementoftheEarth.Isitsafe?BecausetheSouthPoleisahighaltitudesite,theglareofthesunlighthereisveryintense.It’salsoreflectedbythesnow,soifyougooutside,remembertowearsunglassesandusesuncream.Ifyoudon’t,there’sasevereriskthatyou’lldamageyoureyesightorgetbadlysunburnt.Isitcold?Yes!Beverycarefuloutintheopenair!Thetemperatureisbetweenminus21℃inthesummerandminus78℃inthewinter,andyoucanbecomenumbwithcoldwithoutrealising.There’sheavyfrostevenonthewarmestsummerdays,andifit’squietyoucanhearyourbreathfreeze.Soifyouleavethestation,dresswarmlyandcarrydryclothingandaportableradio.Isthereanythinggoodabouttheweather?Theairisverypure,anditdoesn’tsnowverymuch-onlyaboutfourmillimetresayear.There’sverylittlewindandtheskyisusuallyclear.It’spossiblythecalmestplaceonEarth.What’sitliketolivehere?Lifeisquiteabnormal.Sunriseandsunsetcomeonceeverysixmonths,andinthewinterthetotalabsenceofdaylightcanbetiresome,andforsome,depressing.We’retotallyisolatedexceptforradioandelectroniccommunications,asnoaircraftcanflyhereforabouteightmonths.Wheredowelive?TheSouthPolescientificstationissituatedonaplatformofice,3,000-4,000metreshigh,butunderonlyafewmillimetresofsnow.Wehaveaminimumof28peoplelivinghereinthewinterandamaximumof125inthesummer.Thelivingquartersaremodestwithfewluxuries,butcosy.There’sacomfortabledormitoryforsleeping,thecanteenservesgreatfood,andthere'sawell-stockedlibraryofDVDsandvideos.Butshowersandlaundryarelimited,becausewaterisveryvaluable.Wediscourageyoufromsmokingexceptinspecificareas.Medicalassistanceisavailableincaseofanemergency.Anyotheradvice?Rememberthatconventionalequipmentdoesn’talwaysworkasitshoulddo.Ifyouuseanelectricdrill,thepowercordwillsnap.Photographyistrickytoo,asfilmisfragileandthecamerabatterydoesn’tworkinthecold.Don’tleaveanyrubbish,anddon’tforgetthattheecologyofAntarcticaisverydelicate,sodon’ttakeanysouvenirshomewithyou,andbecarefultoleavenothingbutfootprints.Finally,rememberthatwe’reallvisitorstotheSouthPole.It’saprivilege,notarighttocometothisextraordinaryplace.TheTravelsofMarcoPoloTheyearis1271AD.Imaginea17-year-oldboyfromVenice,Italy,well-educatedandtrainedforlifeasarichtrader.Hesetsoffwithhisfatheranduncleona25-yearjourneytomysterious,distantlandsthatmostpeopleinEuropehaveneverheardof.Whileontheirjourneybuyingandsellingspices,silksandjewels,theybefriendoneofthemostpowerfulmenonEarth,KublaKhan.Theboy’snamewasMarcoPoloandmanyyearslaterabookabouthistravelswaspublishedwhichmadehimfamous.MarcoPolotoldhisfantasticstoriestoawriternamedRustichellowhowrotethemdownforhim.Thismanwaswell-knownforhisstoriesandromantictalesofthelegendaryEnglishKingArthur,butsomanypeopledoubtedthereliabilityofhisbookTheTravelsofMarcoPolo.However,Chinesehistorianshavefoundobscurenamesandfactsinthebookthatcouldonlyhavebeenknowntosomeoneintimatewiththecountry.ManyofMarco’sstorieswereaboutChinaanditspeople.Hetoldstoriesaboutthetowns,citiesandpopulationsingreatdetail.HedescribedtheamazingthingshesawinChinasuchaspapermoneyandblackstonethatburned(coal).WithverylittlecontactbetweenChinaandtheWest,itisnotsurprisingthatpeopleinarichpowerfulplacelikeVenicecouldnotbelievehisstories,norintheideaofhuge,richcitystatesinhabitedbymillionsofpeople.TherecouldsurelybenocomparisonwithVenice?AgeneralmythhasgrownuparoundMarcoPolothatheintroducedsuchthingsasspaghettiandicecreamfromChinatotheWest.ThereisnotruthtoanyoftheseclaimsandactuallytheyarenotmentionedinMarcoPolo’sbook.However,MarcoPolo’sbookisstillauniqueinsightforitsage.Mostimportantlyitwasagreatinfluenceformanyfuturetravellers.ChristopherColumbusleftbehindawell-worncopythathereadasinspirationonhisownvoyagestoAmerica.LastPartofJourneyforFirstWomentoCrossAntarctica1___________________ThefirsttwowomentocrosstheAntarcticcontinentonfoothavebegunthelastpartoftheirlongjourney.LivArnesen,whois47andcomesfromNorway,andAnnBancroft,whoisa45-year-oldfromtheUSA,havebeenskiingacrosstheicesince13thNovember.Theyhavebeenusingsailstohelpthempulltheirequipment,whichweighs110kilos,behindthem.2__________________OnSundaytheyreachedtheRossIceShelf,90daysaftertheyfirstlefthome.TheRossIceShelfisaflatpieceoffloatingicewhichisbiggerthanFrance.Thereare750kilometresofdangerousicelefttocrossbeforetheyreachMcMurdoStation.Theymustarrivethereby22ndFebruaryinordertoboardtheshipwhichwillbewaitingforthem.Iftheyarelate,theshiprisksbeingtrappedintheice.3_________________Thetemperatureis,onaverage,minus34℃,butthisisnotextremeinpolarexploration.Whenthewindblowsitcanbemuchcolder.ButitissummerintheAntarcticatthemoment,sothesunnevergoesdown-itslayslight24hoursaday.Thereisnosoundapartfromthewindandsometimesaloudnoiselikeathunderstormwhenagiantpieceoficebreaksawayfromtheshelfandfallsintothesea.Themainrisktopolarexplorersisnotthecold;itissunburn.Therearenocloudsorpollutiontohidethesun,sotheairisverydear;youcanseefor70kilometres.4_________________Boththeexplorersusedtobeteachers.Theyhaveasatellitephone,sothattheycantalkaroundtheworld.Astheycrosstheice,headingtowardstheSouthPole,schoolchildrenfromallovertheworldarefollowingthemontheInternet.MissBancroftsaidthattheydidnotfeelaloneknowingthatsomanypeoplehadmadefriendswiththemusingtheInternet.5_________________Thetwowomenhavehadtoeatdriedfood,whichtheymixwithsnowandthencook.Thefoodisenoughforthebody’sneeds,butdoesnottasteverygood.“Wearefeelingverytiredbecauseofspending91daysfightingtheiceandwind.Wearebothalittlethinnerthanwhenwestarted”,saidMissBancroft,“it’sadreamcometrueforus-butitwillbegoodtogethome,seeourfamiliesandhaveahotbath!”Module2TheRenaissanceFormanypeople,theRenaissancemeans14thto16thcenturyItaly,andthedevelopmentsinartandarchitecture,musicandliteraturewhichtookplacethereatthattime.Butthereisoneworkwhich,perhapsmorethananyother,expressesthespiritoftheRenaissance:theMonaLisa.Itisbelievedtobethebestexampleofanewlifelikestyleofpaintingthatamazedpeoplewhenitwasfirstused.PaintedbyLeonardodaVinciintheyears1503-1506,theMonaLisaisamysteriousmasterpiece.PeoplewanttoknowwhoMonaLisais,andwhysheissmiling.EvenifpeopledonotknowmuchabouttheRenaissance,theyhaveheardofthispainting.ButtheRenaissanceis,ofcourse,morethanjustMonaLisa.RenaissanceisaFrenchwordwhichmeans“rebirth”anditfirstappearedinEnglishinthe19thcentury.ThewordwasusedtodescribeaperiodinEuropeanhistorywhichbeganwiththearrivalofthefirstEuropeansinAmerica,anageofexploration,andthebeginningofthemodernworld.ItwasasifEuropewaswakingupafterthelongsleepoftheMiddleAges.FromItaly,theideasoftheRenaissancerapidlyspreadnorthwardstoFrance,Germany,England,andtherestofEurope.TradewithotherpartsoftheworldmeantthatEuropewasgettingricher,too.Thismeantthatpeoplehadmoneytospendonthearts;anditbecameeasierforartiststofindpeoplewhocouldaffordtobuytheirworksoremploythem.LeonardoworkedforimportantpeoplesuchtheDukeofMilan,and,towardstheendofhislife,theKingofFrance.RenaissanceartistsfoundnewideasfortheirworkinclassicalGreeceandRome.Buttheylookedforward,too,byopeningnewfrontiersinthearts.Paintersdiscoveredhowtoperspectiveandtheeffectsoflight;composersputdifferentvoicestogetherandcreatepolyphony(“manyvoices");architectspreferreddesigningbuildingswithmorelightwhichcontrastedwiththeheavinessoftheGothiccathedralsoftheMiddleAges.Thesenseofexplorationwhichmotivatedtheartistswenthandinhandwithanewtypeofphilosophy.AftercenturiesofacceptingamedievalworldviewinwhichhumanlifewasconsideredoflittlevaluecomparedwiththegreatnessofGod,philosophersbeganaskingquestionslike“Whatisaperson?”or“WhyamIhere?”Forthefirsttime,theyputpeople,notreligion,atthecentreoftheuniverse.TheRenaissancewasatimeofscientificinvention,too.Leonardo,aswellasbeingoneofthegreatestpainterstheworldhaseverknown,wasalsoaskilledinventor.Whereverhewent,hecarriedanotebookaroundwithhim,inwhichhewrotedownhisideas.Theyincludeddetaileddrawingsofthehumanbody,plansforengineerstobuildcanalsandbridges,andastonishingdrawingsofmachineswhichwerenottobebuiltuntilhundredsofyearslater,suchasaeroplanes,parachutes,submarinesandtanks.TowardstheendofhislifehewasemployedbytheKingof65Francetodoscientificresearch,andhedidnothavealotoftimeforpainting.Inshort,Leonardowasanextraordinarygenius,anexampleofwhathasbeendescribedas“Renaissanceman”:someoneinterestedineverythingandwithmanydifferenttalents.ButevenifhisonlycontributiontohistoryhadbeentheMonaLisa,itwouldhavebeengeniusenoughforalltime.READINGANDWRITING(2)ThursdayWearrivedontheovernightferrytotheHookofHollandandtookatraintoAmsterdamCentralStation.Itwasonlyashortride.It’snoteasytofindyourwayaroundthetown.Alotoftheroadsfollowthecanals,whicharen’tstraightbutareshapedlikehorseshoes.Soyoucanwalkalongastreetforhalfanhourorsoandendupfiveminutesfromwhereyoustarted.However,mostpeopledon’twalk-therearethreemillionbikesintownandagoodbusandtramsystem.Thereareboats,too.Abouthalfofthemarefortourists,theothersarehouseboatswithpeoplelivingonthem.Wespentthewholedaywalking.Tomorrowwe’regoingtorentbikes.FridayWespenttodaylookingathouses.Thearchitectureisastonishing,quitedifferentfromotherEuropeancountrieswe’vebeento.Thehousesaretallandthin,andmanyofthemhaveafantasticallyornateRenaissanceappearance.IntheMiddleAgesthehousesweremadeofwood.Then,attheendofthe15thcenturytherewasahugefireandaboutthreequartersofthetownwasdestroyed.Afterthat,housesweremadeofbrick.UnlikeotherplacesinEurope,wherehouseownersweretaxedonthesizeof-theirwindows,herethetaxesdependedonthewidthofthehouse-sotheykeptthemnarrow,butbuiltthemtall.Well,that'swhatClairesays,andshereaditintheguidebook.SaturdayWevisitedtheVanGoghMuseum,insteadofthemorefamousRijksmuseum.Itwasastonishing.1hadn’treallylookedatanyofVanGogh’spaintingsbefore.Heseemstohavere-inventedtheart.Itdoesn’tmatterwhetherheisdoingaportraitoralandscape—he’sagenius.Inthelast70daysofhislifebeforeheshothimselfheproduced70paintings,andIreckonthey’realmostallmasterpieces.YetinallhislifeVanGoghonlyeversoldonepainting!Wemusthavespentthreehoursinthatmuseum.WhenwecameoutItoldClaireIthoughtVanGoghwasthegreatestpainterinhistory.SheremindedmethatwewereleavingforParistomorrow,whereweweregoingtoseethemostfamouspaintingintheworld...ThePuzzleoftheMonaLisaTheMonaLisaisthesubjectofmanystories,butthereisoneanecdotewhichremainsapuzzle.IsthepaintingintheLouvretheauthenticworkbyLeonardodaVinci...orjustacopy?Thestorybeganonedayin1911whensomeonenoticedtheMonaLisawasmissing.Aspokesmansaid,“Theburglarlefttheantiqueframeandtheglassbehind.Hemusthavegonethroughthebasementtothemaincourtyard.Apasserbysawamanwithamoustache,carryingaparcelunderhisarm,dashoverthestreetcrossing,alongtothecrossroads.Hethenfleddownasideroad.We’reappealingtoanyonewhosawthesuspecttocontactus.”SowhostoletheMonaLisa?Andwhy?NewsaboutthelossoftheMonaLisawascirculatedinalltheFrenchnewspapers,andtherewasawidespreadsearchfortheburglaralloverthecountry.Thepolicesaid,“Wedon’tthinktheburglarwasworkingalone.We’reseekingagangofcriminals.”Twoyearslater,amanwithamoustachewenttoandealerinFlorenceinItalyandmadeatentativeattempttoselltheMonaLisa.Theartdealercheckedit,agreeditwasauthentic...andthencalledthepolice.Whydidtheburglar,VincenzoPerugia,waitsolong?PerugiahadstolentheMonaLisaonbehalfofthechieforganiserofthecrime,EduardodeValfierno.ButPerugiamadeafundamentalmistake.HetrusteddeValfiernotopayhimforthepainting.ThedrawbackforPerugiawasthatdeValfiernodidn’tinfactneedthepainting,onlythenewsofthetheft.DeValfiernomadesixsuperbcopiesandsoldthem,claimingthateachonewastheauthenticstolenpainting.Ofcourse,thefactthatthereweresixsubstituteswasconfidential.Thesixbuyersdidn'tknowabouttheotherpaintings.What'smore,deValfiernodidn’tneedtopayhisdebttoPerugia.Aftertwoyears,Perugiagottiredofwaitingtobepaid,andtriedtosellthepainting.WhentherealMonaLisaturnedupinFlorence,DeValfiernosimplytoldhisbuyersthatitwasmerelyacopy.TheoutcomeofthestoryisthatPerugiagottheblameforthecrimeandwenttoprison.DeValfiernoremainedatlibertyfortherestofhislife.Butthereisstillapuzzle.TherewereanumberofprecisecopiesoftheMonaLisapaintedbygiftedstudentsofLeonardodaVinci.Partofthepainting’sfascinationiswhethertheoneintheLouvrewasauthentic...evenbeforeitwasstolen.AndifPerugiastoleacopy...whohastheauthenticMonaLisa?PrintingPrintingistheprocessofmakingmanycopiesofasingledocumentusingmovablecharactersorletters.InChina,printingwasknownasearlyasinthe7thcentury,duringtheTangDynasty;inEurope,itwasanimportantpartoftheRenaissance.PrintingansweredaneedbecausepeoplewerethirstyforKnowledge.Beforeprintingwasinvented,copiesofamanuscripthadtobemadebyhand,usuallyonanimalskins.Thiswasadifficulttaskthatcouldtakemanyyears,andwhichmadebooksveryexpensive.Printingmadeitpossibletoproducemorecopiesinafewweeksthancouldhavebeenproducedinalifetimewrittenoutbyhand.ItisbelievedthataGerman,JohannGutenberg,madethefirstprintingpressinEurope.Headapteditfromthemachinesfarmersusedtosqueezeoilfromolives.Itusedpaper,whichwasmoresuitableforprinting(andcheaper)thananimalskins.Paper,likeprinting,hadbeeninventedmuchearlierinChinaandithadfounditswaytoEurope,viasoutheastAsiaandthenIndia.Bythe10thcenturyAD,paperwasbeingproducedinBaghdad.ThefirstpapermillinEuropewasbuiltattheendofthe12thcentury.ThefirstbookthatGutenbergproducedwasaBible.ButastheideasoftheRenaissancedeveloped,sodidthedemandfortheGreekandLatinclassics,whichhadbeenlargelyignoredforupto2,000years.Peoplealsowantedbooksintheirownlanguages.Theinventionofprintingmeantthatthisdesirecouldbesatisfied.SoontherewereprintingpressesallovernorthernEurope.In1476WilliamCaxtonsetuphisownpressinLondon,andEnglandbecameoneofthemostimportantcentresoftheprintingindustry.Thisspreadofprintedbooksledtoarenewedpassionforartisticexpression.Withoutthedevelopmentoftheprintingpress,theRenaissancemayneverhavehappened.Withoutinexpensiveprintingtomakebooksavailabletoalargesectionofsociety,thesonofJohnShakespeare,agovernmentofficialinruralEnglandinthemid-1500s,mayneverhavebeeninspiredtotakeupwritingasaprofession.WhatwesterncivilizationgainedfromGutenberg’scontributionisimpossibletocalculate.Venice,EndangeredCityTherecanbefewmorebeautifulcitiesintheworldthanVenice;butastheworld’ssealevelsriseduetothewarmingoftheatmosphere,thereisalsoadangerthatitsastonishingarchitectureandpreciousworksofartmayonedayendupatthebottomoftheMediterranean.OneofthemostfamouspartsofVenice,visitedbymillionsoftourists,isStMark’sSquare.150yearsagoitusedtofloodonceortwiceayear.Nowitfloodseveryweek.Theeffectonpeople’slives,andonthewonderfulRenaissancebuildings,isterrible.OneVenetiansaid:“Idon’tknowanyonewhosleepsonthegroundflooroftheirhouseanymore.It’salwaystoowetandsometimesthewatercomesin.”Thecity’sbattlewithwaterdatesbackover1,500years.Itswealthhasalwaysdependedonitspositioninthemiddleofthesea,whichmeantthatitwaseasyforshipstostopthereandtrade.BythetimeoftheRenaissanceinthe15thcentury,itwasoneoftheworld’srichestcities,tradingwithboththeEastandtheWest.Butthecity’sleadersalwaysdependedonskilledengineerstokeepVenicefromsinkingunderthewaves.Thewonderfularchitectureissupportedbyhugesectionsoftreespusheddeepintotheearthunderthewater.Woodisdestroyedbyacombinationofairandwater;butundertheearththereisnoair,sothewoodhassurvivedoneandahalfthousandyears.ForcenturiestheVenetiansmadecarefulcalculationsabouthowtokeepthewaterlevelfromgettingtoohigh.Butinthe20thcenturytheknowledgewasbasicallyforgotten.Peopledidnotrealisetheeffectthattakingwateroutofthegroundwouldhaveonthecity.Duringthe1950sfactoriestookwateroutoftheearth,makingitdrier;thentheweightofthebuildingssqueezedtheeart
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