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地球脈動(dòng)-兩極之間PlanetEarth-FromPloetoPole-FromPoletoPoleGroup2PlanetEarthNorth北極熊Polarbears.極晝Polarday北極苔原Arctictundra北美馴鹿caribouNotenoughenergyreachesgroundtoenabletreestogrow亞寒帶針葉林Subarcticconiferous遠(yuǎn)東豹Amurleopards溫帶闊葉林temperatebroadleavesVariousbirds熱帶叢林jungle海豹Seals大白鯊Greatwhites海洋ocean雄帝企鵝MaleEmperorPenguins極夜polarnightSouthRepresentativeCreaturesPolarday極晝

It’smarch.AndlightreturnstohighArctic,aPolarbearstirsfromherden.Heremergencemarksthebeginningofspring.Andthelittlebearscometotheirmothertogetfood.Theirmotherthathasnoteatenfor5monthsandhaslosthalfherbodyweightconvertsthelastofherfatreservesintomilkforherbabies.Temperature-30.Thebabiesstillneedtoliveintheshelter.Thesunwilldissolvetheice,whichwillhinderthebeartohuntitsfood(seal).Nearlyhalfofthebabybearswilldieinthefirstyearinthebrokenice.

Polarbears北極熊

Arctictundra北極苔原NorthernCanada’swildfrontierEveryyear3millionsofcariboumigrateacrosstheArctictundra(北極苔原）.Thisisthelongestoverlandmigrationmadebyanyanimal.Someherdstravelsover2000milesayearinsearchoffreshpastures.Thisisthelongestoverlandmigrationmadebyanyanimal.Therearewolvesinhangerschemingtocatchthenewlyborncalves.Thestrategyisthatrunningdirecrlyattheherdtomaketheminpanicfirst,andthentrytocapturetheseparatedtheherd.Andnowit’seasiertotargetanindividual.

caribou北美馴鹿Midsummerontundraandthesundoesnotset.Astheselatitudesthesun’sraysareglancing.Andnotenoughoftheirenergyreachesthegroundtoenabletreestogrow.temperatebroadleaves溫帶闊葉林

TheAmurleopard-therarestcatintheworld,syblolizethefragilityofournatureheritage.Thereareonly40Amurleopardsleftinthewild.Andthatnumberisfalling.Thecatshasbeenpushedtotheveryedgeofextinctionbyhuntingandthedestructionoftheirhabitat.

Amurleopards遠(yuǎn)東豹Allanimals,rareorcommon,ultimatelydependfortheirenergyonthesun.

JungleInthetropicsthesun’sraysstriketheearthheadon,sothejunglegrowssovigorouslyand

supportssomuchlife.Thisforestcoversonly3percentoftheplanet’ssurface,butitcontainsmorethan50percentofallitsplantsandanimals.Thereare42differentspeciesofbirdsofparadiselivinginthegreatislandofNewGuinea,eachmorebizarrethanthelast.Birdsofparadise

OceanSummeristhetimeofplentyandit’snowthatthesealsstarttobreed.

Seals海豹Greatwhites大白鯊ElephantsBuffalo水牛Inadryseason,thousandsofelephantshavestartedtotravelindesperatesearchforwater.AllacrossSouthAfricaanimalarejourneyingforthesamereason.

polarnight極夜MaleEmperorPenguinsarefacingthenearestthatexistsonplaneEarth.WinterinAntarctica.It’scontinuousdark.Andtemperaturesdroptominusseventydegreescentigrade.ThePenguinsstaywhenallothercreatureshavefled.Becauseeachguardsatreasure:asingleeggrestedonthetopofitsfeet.Andkeptwarmbeneath

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