Butthere's a couplespotsinsideoftheseawherethetwocontinentscomeextremelyclosetotouchingattheStraitofGibraltar, wherethey'reonly 14 kilometersapart, andattheStraitofSicily, wherethey'reonly 145 kilometersapart, connectingthetwocontinentstogetherby a bridgeor a tunnel.
Butactuallyconstructingsuch a structureis a loteasiersaidthandone.
しかし、実際にこのような構造を構築するのは、言うは易く行うは難しです。
Let's take a lookatbuildingsomethingacrosstheStraitofGibraltarfirst, thenarrowestpointherebetweenthecontinentsisonly 14.3 kilometerswide, andhere's a listofdozensofbridgesthatalreadyexiststhatairlongerthanthat.
Thereisbasically a giantunderwatercliffrighthereinthemiddleofthestraightbecausethewaterisabout 900 m deep.
水深が900mくらいあるので、基本的にはストレートの真ん中あたりに巨大な水中断崖があります。
Itsomepointsforcomparison.
それは比較のためのいくつかのポイントです。
ThedeepestpointbetweenEnglandandFrance, wheretheChannelTunnelwasconstructed, isonLee 115 m beneathsealevel, andthatstilltookoversixyearsandabout €12 billionintoday's moneytoconstructbuilding a 14 kilometerlongtunnelorbridgeunderorovernearly a kilometerdeepoceanisoutsidetherealmofourcurrentengineeringcapabilities, butitmightjustbepossibletobuildoneofthelowkeyHaitianjustgetsshifted a littleovertothewest.
Overhere, thedistancebetweenEuropeandAfricais a littlelongerataround 23 kilometersinsteadofonly 14.
こちらでは、ヨーロッパとアフリカの距離は14kmと少し長く、23km程度です。
Buttheoceandepthisat a muchmoremanageable 300 m insteadof 900 foranothercomparison, thereis a tunnelunderconstructionrightnowinNorwaythatisverycomparabletothis.
Whencompletedin 2025 or 2026 thewrongfastfixedlengthwillconnecttheNorwegianmunicipalitiesofrandombergandbrokenwithoneanotherby a tunnelunderneath a giganticfjord.
Thetunnelwillstretch 27 kilometerslongandreach a maximumdepthbeneaththeoceanof 392 m, meaningthatthistunnelwillcrushboththelengthanddepthof a hypotheticaltunnelbetweenEuropeandAfricaattheStraitofGibraltar.
AnothermajorproblemisthefactthattheStraitofGibraltarrestson a seriouslyactivegeologicalfaultlinecalledtheAzoresGibraltarTransformFault, whichcutsrightthroughthemiddleofthestraight.
Theexistenceofthisfaultlineandthethreatoflargeearthquakesinthefutureis a significantengineeringchallengeforanytunnelorbridgeintheareatoovercomethatneithertheChannelTunnelnortheNorwegianRogfastfixedlengtheverfaced.
I'd saythat's mostlybecause a SicilyandTunisiaareseparatedfromeachotherby 145 kilometersofopenoceanandbeSicilyisstilljust a islandandisn't evenconnectedtotheEuropeanmainlanditself.
OnesuchideacallsfortheconstructionoffourartificialislandsbetweenSicilyandTunisiaalong a straightline, andthesubsequentconstructionoffiveseparatetunnelsconnectingtheislandstogetherwiththeTunisianandSicilianmainland's.
ThesetunnelswouldprovidenonstoprailservicebetweenPalermoandTunis, with a totaltransportationtimeofthreehourseachway, andwouldfurtherconnecttherailnetworkofNorthAfricawiththenetworkinEurope.
Finally, thisprojectwouldhopefullybecombinedwith a longplannedandtroubledStraitofMessinabridgethatwouldhypotheticallyconnectSicilywiththeItalianmainland.
Butifithadbeenbuilt, theplancalledfor a 3.3 kilometerlongsuspensionbridgethatwouldbesupportedbytwoenormous 382 m highpillars, eachonebeingtallerthantheEmpireStateBuildingandmakingthebridgebyfarthetalleststructureanywhereinItalyandoneofthetallestinallofEurope.
Theytake a bitoverninehours, andtheyonlycost 40 to €60 andtherearealmostconstantfairieseverydayacrosstheStraitofGibraltarbetweenSpainandMoroccothatonlytakeaboutanhourandonlycost €35.
A teachingregularpeoplelikeyouormeaboutcomplicatedsubjectsthroughactivelearningandproblemsolvingmathandphysicscanseemincrediblyoverwhelmingwhenyoudon't havesomeonetheretohelpguideyouthroughthestepsintheprocess.
Bybreakingthesesubjectsdownintoeasytofollowbitesizedchunksacross a hugevarietyofdifferentstemfields, youcanevenlearnsomethingneweverysingledaywiththeirshort, dailychallengesthateachtieintooneoftheirfullinteractivecourses.
IfyouwanttolearnevenMaura's well, ifyoulikewatchingmychannel, then I knowthatyouenjoylearningaboutcoolthingsforfree, soyoushouldheadovertobrilliantorcslash r L L tosignupforfreeandthenbybeingoneofthe 1st 200 peopletousethatlink.
あなたもマウラの井戸を学びたい場合は、あなたが私のチャンネルを見て好きなら、その後、私はあなたが無料でクールなものについての学習を楽しむことを知っているので、あなたが無料でサインアップして、そのリンクを使用するために第1回200人のうちの1人であることによって、華麗なオークスラッシュR L Lに向かうべきであることを知っています。