Phantse zonke izilwanyana ezinethambo lomqolo eziphilayo ziyazala ngokuzala ngokwesondo,sowenza iidinosaur. Iimpawu zesini zezilwanyana eziphilayo zihlala zineempawu zangaphandle ezicacileyo, ngoko ke kulula ukwahlula iinkunzi neemazi. Umzekelo, iipeacocks eziziinkunzi zineentsiba ezintle zomsila, iingonyama eziziinkunzi zineengwele ezinde, kwaye iielk eziziinkunzi zineempondo kwaye zikhulu kuneemazi. Njengesilwanyana saseMesozoic, amathambo eedinosaur angcwatywephantsiumhlaba iminyaka ezigidi ezingamashumi, kunye nezicubu ezithambileyoyeyiphiingabonisa isiniiidayinasozinyamalale, ngoko ke ngokwenenekunzimaukwahlula isini seedayinaso! Uninzi lweefosili ezifunyenweyo ngamathambos, kwaye zimbalwa kakhulu izihlunu kunye nezinto eziphuma kulusu ezinokugcinwa. Ngoko ke singazigweba njani isini seedinosaur kwezi fosili?
Ingxelo yokuqala isekelwe ekubeni kukho ithambo le-medullary na. Xa uMary Schweitzer, isazi nge-paleontologist kwiYunivesithi yaseNorth Carolina e-United States, wenza uhlalutyo olunzulu lwe-"Bob" (i-tyrannosaur fossil), wafumanisa ukuba kukho umaleko wethambo okhethekileyo kumathambo e-fossil, abawubiza ngokuba ngumaleko wethambo. Umaleko wethambo uvela ngexesha lokuzala nokubeka iintaka eziziinkazi, kwaye ikakhulu ubonelela nge-calcium kumaqanda. Imeko efanayo ikwabonwe nakwii-dinosaur ezininzi, kwaye abaphandi banokwenza izigqibo malunga nesini see-dinosaur. Kolu phononongo, i-femur yale fossil ye-dinosaur yaba yinto ephambili ekuchongeni isini see-dinosaur, kwaye ikwalithambo elilula ukuchonga isini. Ukuba umaleko wezicubu zethambo ezinemingxuma ufunyenwe ujikeleze umngxuma wethambo le-dinosaur, kunokuqinisekiswa ukuba le yi-dinosaur yabasetyhini kwixesha lokubeka. Kodwa le ndlela ifanelekile kuphela kwii-dinosaur ezindizayo kunye nee-dinosaur ezilungele ukuzala okanye ezizele, kwaye azikwazi ukuchonga ii-dinosaur ezingakhulelweyo.
Umzuzwanaingxelo kukwahlula ngokusekelwe kwikona yeedayinaso. Iingcali zezinto zakudala zakha zacinga ukubaisini yayinokwahlulwa zii-crests zeedinosaur, indlela eyayifaneleke kakhulu kwiHadrosaurus.ubungakananiukunqongophala kunye nesikhundla se "isithsaba" yeIHadrosaurus, isini sinokwahlulwa. Kodwa isazinzulu esidumileyo se-paleontologist uMilner siyakuphikisa oku, I-WHOsaid, “Kukho umahluko kwiintloko zeentlobo ezithile zeedayinaso, kodwa oku kunokuqikelelwa kuphela kwaye kuqikelelwe.” Nangonakwakhona umahlukophakathi Iingcali azikwazanga ukufumanisa ukuba zeziphi iimpawu ze-crest ezizezesilisa nezizezesifazana.
Intetho yesithathu kukwenza izigwebo ngokusekelwe kwisakhiwo somzimba esahlukileyo. Isiseko kukuba kwizilwanyana ezincancisayo eziphilayo kunye nezilwanyana ezirhubuluzayo, iinkunzi zihlala zisebenzisa izakhiwo zomzimba ezikhethekileyo ukutsala iimazi. Umzekelo, impumlo yenkawu i-proboscis ithathwa njengesixhobo esisetyenziswa ziinkunzi ukutsala iimazi. Ezinye izakhiwo zeedayinaso zicingelwa ukuba zisetyenziselwa ukutsala iimazi. Umzekelo, impumlo enomphetho yeTsintaosaurus spinorhinus kunye nesithsaba sikaGuanlong wucaii zisenokuba sisixhobo somlingo esisetyenziswa ziinkunzi ukutsala iimazi. Nangona kunjalo, akukho mathambo aneleyo okuqinisekisa oku okwangoku.
Isivakalisi sesine kukugweba ngobukhulu bomzimba. Iidinosaur ezindala ezinamandla zohlobo olufanayo zisenokuba yayiziinkunzi. Umzekelo, iintloko zeengonyama zePachycephalosaurus ezingamadoda zibonakala zinzima kunezo zezilwanyana ezibhinqileyo. Kodwa uphando oluchasayo le ngxelo, olubonisa umahluko ngokwesini kwezinye iintlobo zeedinosaur, ingakumbi iTyrannosaurus rex, lukhokelele ekukhetheni okukhulu kwengqondo kuluntu. Kwiminyaka emininzi eyadlulayo, iphepha lophando lathi iT-rex yabasetyhini yayinkulu kuneT-rex yamadoda. Nangona kunjalo, oku kwakusekelwe kuphela kwiisampuli ezingama-25 ezingaphelelanga zamathambo. Sidinga amathambo amaninzi ukuze sihlalutye ngokupheleleyo iimpawu zesini zeedinosaur.
Kunzima kakhulu ukufumanisa isini sezilwanyana eziphelileyo kumaxesha amandulo ngokusebenzisa iifosili, kodwa uphando lwabo luluncedo ngakumbi kwizazinzulu zanamhlanje kwaye lunempembelelo ebalulekileyo kwimikhwa yokuphila kweedinosaur. Nangona kunjalo, zimbalwa kakhulu imizekelo ehlabathini enokufunda ngokuchanekileyo isini sedinosaur, kwaye bambalwa kakhulu abaphandi bezenzululwazi kwiinkalo ezinxulumene noko.
IWebhusayithi esemthethweni ye-Kawah Dinosaur:www.kawahdinosaur.com
Ixesha lokuthumela: Feb-16-2020