Ama-Dinosaurs angenye yezinhlobo ezithakazelisa kakhulu emlandweni wokuziphendukela kwemvelo eMhlabeni. Sonke sijwayelene kakhulu nama-dinosaurs. Ayebukeka kanjani amadayinaso, ayedlani amadayinaso, ayezingela kanjani amadayinaso, hlobo luni lwendawo ayehlala kuyo amadayinaso, ngisho nokuthi kungani amadayinaso ashabalala… Ngisho nabantu abajwayelekile bangachaza imibuzo efanayo mayelana namadayinaso ngendlela ecacile nenengqondo. Sesivele sazi okuningi ngama-dinosaur, kodwa kunombuzo owodwa abantu abaningi abangase bangawuqondi noma bacabange ngawo: Aphila isikhathi esingakanani ama-dinosaurs?
Izazi ze-paleontologists zake zakholelwa ukuthi isizathu esenza ukuba izibankwakazi zikhule zibe zinkulu kangaka ukuthi zaziphila iminyaka eyi-100 kuya kwengu-300. Ngaphezu kwalokho, njengezingwenya, ama-dinosaurs ayeyizilwane ezikhula kancane, ezikhula kancane futhi ngokuqhubekayo kukho konke ukuphila kwazo. Kodwa manje siyazi ukuthi akunjalo. Ama-dinosaurs amaningi akhula ngokushesha futhi afa esemncane.
· Ungahlulela kanjani isikhathi sokuphila sama-dinosaurs?
Ngokuvamile, ama-dinosaurs amakhulu aphila isikhathi eside. Ubude besikhathi sokuphila kwama-dinosaurs banqunywa ngokufunda izinsalela. Ngokusika amathambo ama-dinosaur anezinsalela kanye nokubala imigqa yokukhula, ososayensi bangahlulela iminyaka ye-dinosaur bese bebikezela ubude bempilo ye-dinosaur. Sonke siyazi ukuthi iminyaka yesihlahla inganqunywa ngokubheka amasongo okukhula kwawo. Ngokufana nezihlahla, amathambo e-dinosaur nawo akha "amasongo okukhula" njalo ngonyaka. Minyaka yonke isihlahla sikhula, isiqu saso sizokhula siyindilinga, ebizwa ngokuthi indandatho yonyaka. Kungokufanayo nangamathambo e-dinosaur. Ososayensi bangakwazi ukunquma iminyaka yama-dinosaurs ngokutadisha “izindandatho zonyaka” zezinsalela zamathambo e-dinosaur.
Ngale ndlela, izazi ze-paleontology zilinganisela ukuthi isikhathi sokuphila se-dinosaur encane i-Velociraptor sasiyiminyaka engaba ngu-10 kuphela; eyeTriceratops yayiyiminyaka engaba ngu-20; kanye nokuthi inkosi yama- dinosaur, i-Tyrannosaurus rex, yathatha iminyaka engu-20 ukuba ibe mdala futhi ngokuvamile yayifa ineminyaka ephakathi kuka-27 no-33. I-Carcharodontosaurus iphila iminyaka ephakathi kwama-39 nama-53; izibankwakazi ezinkulu ezinezintamo ezinde ezidla uhlaza, njenge-Brontosaurus ne-Diplodocus, zithatha iminyaka engu-30 kuya kwengu-40 ukuba zibe abantu abadala, ukuze zikwazi ukuphila iminyaka engaba ngu-70 kuya kweyikhulu.
Ubude bokuphila kwama-dinosaurs bubonakala buhluke kakhulu emcabangweni wethu. Kungenzeka kanjani ukuthi izibankwakazi ezingavamile kangaka zibe nesikhathi sokuphila esivamile? Abanye abangani bangase babuze, yiziphi izici ezithinta isikhathi sokuphila sama-dinosaurs? Yini eyabangela ukuba izibankwakazi ziphile amashumi ambalwa eminyaka?
Kungani ama-dinosaur engaphilanga isikhathi eside?
Isici sokuqala esithinta isikhathi sokuphila sama-dinosaurs i-metabolism. Ngokuvamile, ama-endotherm anama-metabolism aphezulu aphila ukuphila okufushane kunama-ectotherm ane-metabolism ephansi. Ngokubona lokhu, abangani bangase bathi ama-dinosaurs ayizilwane ezihuquzelayo, futhi izilwane ezihuquzelayo kufanele kube izilwane ezinegazi elibandayo eziphila isikhathi eside. Eqinisweni, ososayensi bathole ukuthi ama-dinosaurs amaningi ayizilwane ezinegazi elifudumele, ngakho amazinga aphezulu e-metabolism anciphisa isikhathi sokuphila sama-dinosaurs.
Okwesibili, imvelo nayo yaba nomthelela omubi esikhathini sokuphila sama-dinosaurs. Enkathini lapho ama-dinosaurs ayephila khona, nakuba indawo ezungezile yayifaneleka ukuba izibankwakazi ziphile, yayisenzima uma iqhathaniswa nomhlaba namuhla: umoya-mpilo osemkhathini, okuqukethwe yi-sulphur oxide emkhathini nasemanzini, kanye nenani lemisebe ephuma emkhathini. indawo yonke yayihlukile kuneyanamuhla. Indawo enokhahlo enjalo, ehambisana nokuzingela okunonya nokuncintisana phakathi kwama-dinosaurs, yabangela ukuba izibankwakazi eziningi zife phakathi nesikhathi esifushane.
Sekukonke, isikhathi sokuphila sama-dinosaurs asikho isikhathi eside njengoba wonke umuntu ecabanga. Ukuphila okuvamile okunjalo kwawavumela kanjani ama-dinosaur ukuba abe ababusi beNkathi ye-Mesozoic, ebusa umhlaba cishe iminyaka eyizigidi ezingu-140? Lokhu kudinga ucwaningo olwengeziwe lwezazi ze-paleontologists.
Iwebhusayithi esemthethweni ye-Kawah Dinosaur:www.kawadinosaur.com
Isikhathi sokuthumela: Nov-23-2023