Kungani izibankwakazi: ukuqagela wezesayensi

Dinosaurs akuzona eyishumi yokuqala yokuba isihloko abanaki kuphela abantu abajwayelekile, kodwa izazi. Bazama ufunde ngalezi ongaqondakali izidalwa konke kusuka kanjani emhlabeni babenza lolu hlobo ophela kungani izibankwakazi saphela. Nakuba isihloko sokugcina ukhathazekile iningi nososayensi abakholelwayo bayatfutfuka unyaka ngamunye ezingasho izinguqulo ezintsha.

Dinosaurs saphela kusukela kwakuwukuhlasela ezisemkhathini

Cha, ngokuphelele akubahluphi ayehlasela njengabafokazi. Kulokhu, isizathu esiyinhloko ukushabalala ingqikithi izibankwakazi ibonisa umsebenzi izindikimba zasezulwini. Kukholakala ukuthi izibankwakazi wafa ngenxa yezimbangela ezilandelayo: ukuwa elisemkhathini enkulu, ubuso amaningi "bombardment" asteroyidi emhlabeni, ukushayisana yomhlaba ne inkanyezi enomsila kanye nekwentiwa ncono emisebeni ngenxa supernova ukuqhuma noma ezinye izici bemvelo efanayo.

izifundo Geological ngokuphindiwe waqinisekisa yokuthi surface eMhlabeni uye phansi ngokuphindaphindiwe ukuba ezahlukene usayizi asteroyidi iwe. Ngo ngokubeka phambili version mayelana nokuthi kungani izibankwakazi saphela, amalungu aleli umbono 'bombardment elisemkhathini "ukhombise inkathi okungenzeka umbhalo waqedwa yokufana wokuwa kwabo nokuqothulwa kwezinhlobo eziningi izibankwakazi. Kuyaphawuleka ukuthi lo mbono, ososayensi kancane sisekelwa kuphela: zesayensi bathi kwakwanele edinokratnogo ukuwa, izifundo omema Crater Chicxulub kanye isayensi yezinkanyezi zomhlaba zingashayisani nezinye izindikimba zasezulwini. Ziyakwazi izazi zokuma komhlaba eziphikisayo kanye kwezazi, kuphikisana ukuthi nezinguquko ezinkulu nezilwane ezihlukahlukene komhlaba singenzeka kuphela ngenxa iconsi okuphindaphindiwe. Noma kungase, kulesi simo akunandaba kuyiphi izibankwakazi kusukela edinokratnogo okunzima noma elisemkhathini. Into esemqoka ukuthi njengoba yalokhu iningi zinhlobo ezibhujisiwe cishe edinomomentno.

Beka phambili ubuyekezo oluhlukile labo njengoba imbangela eyinhloko yokufa amaphuzu nokwanda kwamazinga ngemisebe. Lo mcimbi, ososayensi bathi kuye kwaholela yokuthi Umhlaba waqala ukuthola ukukhanya kwelanga okuncane ngenxa izinqubo zemvelo namakhemikhali esenzeka ozungeze umhlaba. Ngenxa yalokho, kwaba khona Ukupholisa okwandile okungukuthi umthelela umonakala zinhlobo nongenanembeza ku. Ngaphezu kwalokho, inani imisebe singene ngokusebenzisa izingqimba asemkhathini, futhi waba ithonya elibi phezu izinqubo yezinto eziphilayo yokuzala, ekunciphiseni kwabo cishe zero.

Kwethulwa imfundiso yokuziphendukela kungani izibankwakazi saphela, kuthiwa, ngomqondo ongokomfanekiso, uhlamvu eyodwa emaceleni. Njengomthetho, zonke "ezisemkhathini" hypothesis eyakhelwe pundits ababe abameleli enye yalezi zindawo ucwaningo. Uma lokhu acabangele izici kukhona ngokugcwele ukudalula nokuqothulwa kwezinto eziphilayo.

okufushane yemvelo

Uma siphendukela neminye imikhakha yesayensi, kungenzeka ukuthi baqhube enye inombolo izinkolelo-mbono eziphathelene kungani izibankwakazi saphela kusukela. Eyokuqala yalezi kuwumbono izinguquko global Emhlabeni. Kwakuthinta kubhekelwe ngaphansi kwezici eziningana, okungukuthi, ukuhamba amapuleti, ukushintsha ukuphakama kolwandle phansi, ngenxa nabantwana bami ababili bokuqala - Ugxumela lokushisa kanye izinguquko ukubunjwa flora emoyeni.

Inguqulo ye-kungani izibankwakazi saphela yesibili, kuba ushintsho izitshalo iplanethi, esekelwe ukunyakaza khona izingqimba zomhlaba. Ngenxa yalokho, le izilwane ezidla ezinye bakwazi ukuchitha kahle kakhulu izibankwakazi amaphuphu namaqanda laying, futhi ngaleyo ndlela lokulawula ukukhiqizwa kabusha kwalesi silwane bebheke ngincipha.

Lezi zinkolelo-mbono ezicatshangelwayo main ukuthi uzama ukuchaza kungani izibankwakazi saphela. Njengoba ubona, yilowo nalowo kubo uncika yimuphi isici esisodwa, futhi okunye zinikwe yesibili. Yingakho kubalulekile ukuhlanganisa izingxenye imicabango ziqinisekiswa ubufakazi impahla kanye esekelwe ukubonisa olulodwa.