Phantse zonke ii-vertebrates eziphilayo zizala ngokuzala ngokwesondo,sowenza iidinosaur.Iimpawu zesini zezilwanyana eziphilayo zihlala zinezibonakaliso zangaphandle ezicacileyo, ngoko kulula ukuhlukanisa amadoda kunye nabasetyhini.Ngokomzekelo, iipikoko zineentsiba ezintle zomsila, iinkunzi zeengonyama zineemane ezinde, yaye inkunzi yeelk ineempondo yaye inkulu kuneemazi.Njengesilwanyana saseMesozoic, amathambo eedinosaurs angcwatywephantsiumhlaba amashumi ezigidi zeminyaka, kunye nezihlunu ezithambileyoleyoingabonisa isiniiidinosaurszinyamalele, zinjalo ngokwenenenzimaukwahlula isini seedinosaurs!Uninzi lwamathambo afunyenwe ngamathambos, kwaye zimbalwa kakhulu izihlunu nezihlunu zesikhumba ezinokugcinwa.Ke sigweba njani isini seedinosaur kula mathambo?
Ingxelo yokuqala isekelwe ekubeni kukho ithambo le-medullary.Xa uMary Schweitzer, isazi ngezidalwa zamandulo kwiYunivesithi yaseNorth Carolina eUnited States, wenza uhlolisiso olunzulu lwe-“Bob” (ifosili yetyrannosaur), wafumanisa ukuba kukho umaleko okhethekileyo wamathambo kumathambo efosili, awayibiza ngokuba yifosili. umongo wethambo umaleko.Umaleko womongo wethambo ubonakala ngexesha lokuzala kunye nokubeka iintaka ezimaziyo, kwaye ikakhulu zibonelela nge calcium kumaqanda.Imeko efanayo iye yabonwa kwiidinosaurs ezininzi, kwaye abaphandi banokwenza izigwebo malunga nesini seedinosaurs.Kuphononongo, i-femur yale fossil yedayinaso yaba yinto ephambili ekuchongeni isini seedinosaurs, kwaye ikwalelona thambo lilula ukuchonga isini.Ukuba umaleko wethambo lethambo elinombhobho ufunyenwe ujikeleze i-medullary cavity yethambo le-dinosaur, kunokuqinisekiswa ukuba le yidayinaso yabasetyhini ngexesha lokubeka.Kodwa le ndlela ifanelekile kuphela kwiidinosaurs ezindizayo kunye needinosaurs ezilungele ukuzala okanye ukuzala, kwaye azikwazi ukuchonga iidinosaurs ezingakhulelwanga.
Umzuzwanaingxelo kukwahlula okusekwe kwi-crest yeedinosaurs.Abembi bezinto zakudala bakha bayicinga loo ntoisini yayinokwahlulwa ngamaqhekeza eedinosaurs, indlela eyayifaneleke ngakumbi iHadrosaurus.Ngokutsho kweububanziyobuncinci kunye nesikhundla se "isithsaba" yeIHadrosaurus, isini sinokwahlulwa.Kodwa i-paleontologist eyaziwayo uMilner iyakuphikisa oku, I-WHOsaid, “Kukho umahluko kwizithsaba zeentlobo ezithile zeedinosaur, kodwa oku kunokucingelwa kuphela kuze kucingelwe.”Nangona kunjalore are iyantlukwanophakathi ii-dinosaur crests, iingcali azikwazanga ukuxela ukuba zeziphi iimpawu ze-crest ezingamadoda kwaye zeziphi ezibhinqileyo.
Ingxelo yesithathu kukwenza izigwebo ezisekelwe kwisakhiwo somzimba esisodwa.Isiseko sesokuba kwizilwanyana ezanyisayo nezirhubuluzayo eziphilayo, inkunzi idla ngokusebenzisa izakhiwo ezikhethekileyo zomzimba ukutsala iimazi.Ngokomzekelo, impumlo yenkawu igqalwa njengesixhobo esisetyenziswa ngamadoda ukutsala iimazi.Ezinye izakhiwo zeedayinaso kucingelwa ukuba zisetyenziselwa ukutsala iimazi nazo.Ngokomzekelo, impumlo ye-spiny ye-Tsintaosaurus spinorhinus kunye nesithsaba saseGuanlong wucaii inokuba sisixhobo somlingo esisetyenziswa ngamadoda ukutsala amabhinqa.Nangona kunjalo, akukho mathambo aneleyo okuqinisekisa oku okwangoku.
Ingxelo yesine kukugweba ngobungakanani bomzimba.Iidayinaso ezindala ezinamandla zohlobo olufanayo inokuba yayingamadoda.Umzekelo, ukhakhayi lwendoda iPachycephalosaurus lubonakala lunzima kuneyabafazi.Kodwa uphononongo olucela umngeni kule nkcazo, lucebisa umahluko ngokwesondo kwezinye iintlobo zedayinaso, ngakumbi iTyrannosaurus rex, ikhokelele kucalucalulo olukhulu lwengqondo eluntwini.Kwiminyaka emininzi edlulileyo, iphepha lophando lathi i-T-rex yabasetyhini yayinkulu kune-T-rex yamadoda.Nangona kunjalo, oku kwakusekwe kuphela kwimizekelo engama-25 engaphelelanga yamathambo.Sifuna ithambo elingaphezulu ukuhlalutya ngokupheleleyo iimpawu zesini seedinosaurs.
Kunzima kakhulu ukufumanisa isini sezilwanyana ezaphelayo kumaxesha amandulo ngokusebenzisa iifosili, kodwa uphando lwabo lunenzuzo ngakumbi kwizazinzulu zanamhlanje kwaye lunempembelelo ebalulekileyo kwimikhwa yokuphila yeedinosaurs.Nangona kunjalo, kukho imizekelo embalwa kakhulu emhlabeni enokufunda ngokuchanekileyo isini seedinosaurs, kwaye bambalwa kakhulu abaphandi besayensi kwiinkalo ezinxulumeneyo.
IWebhusayithi esemthethweni ye-Kawah Dinosaur:www.kawadinosaur.com
Ixesha lokuposa: Feb-16-2020