Thedocumentarydepictsmonarchbutterfliesgreatandmysteriousmigration.Eachyearsautumn,millionsofmonarchbutterfliesstarttheirincrediblesouthwardmigrationfromCanada,crossAmerica,toMexico.Theyflyabove2,000milestoarrivethemountainofMexico.....ThefilmopenswithcaterpillarsmunchingmilkweedinsouthernCanadainlatesummer.Sooneachcaterpillartransformsitselfintoasilkychrysalis.Roughly10dayslater,adelicatefour-wingedmonarchemerges.Then,atsomeunknownsignal,themonarchstaketotheaironatwo-month,2,000-mileflightoverfields,forests,cities,plains,openwater,deserts,andfinallymountainstocongregateinatiny,high-altituderegionofcentralMexicowheretheyveneverbeenbefore.Incredibly,theyarrivebythemillionsatthesametimeeachyear.Sheddinglightonthisnaturalwonderaresomeoftheworldsleadingmonarchresearchers,includingLincolnBrowerofSweetBriarCollege,independentbiologistBillCalvert,andOrleyChipTayloroftheUniversityofKansas.Puttingthemonarchphenomenonintoperspective,Taylorsays,YouvegotabutterflythatsoriginatinginToronto,oritsoriginatinginDetroit,Michigan,oritscomingdownfromSt.PaulormaybeevenWinnipeg,anditsmovingsouth.SomehowitfindsitswaytoMexico.Couldyoudothat?Nooneyetknowshowthebutterfliesdoit,butTaylorsresearchrevealsthattheyareexpertnavigators.Inoneexperiment,hetransportedMexico-boundmonarchsfromKansastoWashington,DC,andthensetthemloose.Atfirst,theyflewsouthasiftheywerestillinKansas—acoursethatfromWashingtonwouldmissMexicoentirely.Butafterafewdays,theycorrectedtheirflightpath,asifsomeinbornGPSunithadalertedthemtothetruedirectionoftheirdestination.Inanothersequence,NOVAaccompaniescelebratedmonarchwatcherBillCalvertaroundbackcountryTexasashelooksforsignsofthemonarchmigration.Sureenough,theyshowupenmasseandontime,headingtowardtheSierraMadremountainsacrosstheborder—(📔)thelastlegoftheirflight.AndintheMexicanstateofMichoacán,NOVAjoinsmountainvillagersastheycelebratethearrivalofthemonarchsinthefirstweekofNovember.ThebutterfliesarrivalmarksthestartofacelebrationcalledtheDayoftheDead,sincethelocalpeoplehavetraditionallyassociatedthemonarchswiththereturningsoulsoftheirdepartedancestors.Unfortunately,illegalloggingintheMexicanbutterflysanctuariesthreatenstheuniquehabitatthatmonarchsdependonfortheirsurvival.Monarchsmaynotyetbeanendangeredspecies,buttheirannualmigrationisanendangeredphenomenonthatcoulddwindletoinsignificanceifthegiantfirsthattheyclingtoduringthewinterdisappear.Gonealsowouldbethecolorfulfestivalthatclosestheprogram—afireworksdisplaywelcomingthehardyflierstoMexico,withorangeburstsagainsttheblacksky,lookingalmostlikethebeautifulcloaksofthemonarchs..罗伯特(😲)，盗(dào )窃(qiè )癖患者，喜欢写太过(🕌)现(🙀)(xiàn )实的童话故事(🕤)，吓(xià(🚡) )坏孩子(🙇)们。张雪岩叹了一口气，拿出来之前准备好的东西放到茶几上，你不是(shì(🚎) )问我为什么分手吗(🌹)，所有的原因都(🍮)在这里面。苏瑶(yáo )只觉得好(♏)像颠(🚲)覆了自己以往的认(rèn )知(📌)：除族以后(hòu )不(♏)可能再(zài )回来了吗(ma )？(♎)一(💋)场法事中，腿麻的(🌇)润子将骨灰撒在(🅾)了和(hé(🐀) )尚星川（山下智(🛀)久饰）的(🌴)头上，没想(🏅)到这(zhè )场意外却让(ràng )星(📲)川(🕢)对润子一见(jiàn )钟(🤢)情(qíng )，之后，星川对润子展开了一连串与其说是(shì(🥩) )热烈不如(🈲🈲)(rú )说是近乎于(🗞)骚扰的攻势。愤怒冒火的(🛂)眼神、呆滞(🦍)的眼神、亚克结巴说道：(🦁)怎么会？下一刻。其(qí )实，三轮(lú(🧝)n )车是一种很尴尬(💤)的存在(zài )。从它(🍷)的(💖)轮子(zǐ(🕦) )数目里就可以看出，比汽车少一个，比自行车(chē )多一(🆖)个。我们的化学(🌥)老(lǎo )师(🐈)来自青海，初(chū )到松江府，看到一街(✝)三轮车，吓(👏)了(🌬)一(🍎)跳。然后学科(🌈)使然，肯定(🏖)恨不能说(🎾)如果那(nà )家(jiā )伙(🧐)(huǒ )再(👸)得到一(😷)个(🧙)轮子就变成稳定结构，反之如何(🛺)。我们(men )抛开(⏬)什么(me )历史，光(🍲)轮子就决(🚁)定了它的特(tè )殊性。她现在(🛰)无(wú )比后悔那天脑(🐗)抽之后答(🚑)应(🆚)跟(gē(🏿)n )他学(xué )武(🈚)了。清平玥和汤(tāng )平(💰)对视一(🌱)眼，警惕性(xìng )提高，双(♈)方(⏮)(fāng )做好了战斗准备。