Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: Dzidziso yokurovera kweasteroid, iyo yakaunzwa kungwariro huru muna 1980 naWalter Alvarez navashandi biyake, inobatanidza chiitiko chokutsakatika pamugumo wenguva yeCretaceous nekurovera kwebolide anenge makore 66 miriyoni apfuura. Alvarez nevamwe vakati kuwedzera kwakangoerekana kwaita mwero weiridium, kwakanyorwa pasi rose mumatombo enguva yacho, kwaiva uchapupu hwakananga hwokubonderana kwacho. Uchapupu hwakawanda huripo iye zvino hunoratidza kuti chadenga chakakura makiromita 5 kusvika ku15 (3.1 kusvika ku9.3 mamaira) chakarova pedyo neYucatán Peninsula (kumaodzanyemba kwakadziva kumabvazuva kweMexico), chichigadzira gomo reChixulub rakareba makiromita anenge 180 (110 maira) uye chichikonzera kutsakatika kwevanhu vakawanda. Masayendisiti haana chokwadi kana madinosaur akanga achibudirira kana kuti achidzikira pamberi pechiitiko chokurovera. Mamwe masayendisiti anoti kubonderana kwemeteorite kwakakonzera kuderera kwenguva refu uye kusiri kwomuzvarirwo kwetembiricha yemuchadenga chePasi, nepo vamwe vachiti panzvimbo pezvo kwaizodai kwakagadzira dutu risina kujairika. Kubvumirana pakati pamasayendisiti anotsigira rondedzero iyi ndekwokuti kugunun'una kwacho kwakaparira kutsakatika zvose zviri zviviri zvakananga (nokupfurikidza nokupisa kunobva mukubonderana kwemeteorite) uyewo nenzira isina kunanga (kuburikidza nokutonhora kwepasi pose kwakaunzwa apo zvinhu zvakabudiswa kubva mumupata wokubonderana zvakaratidzira mwaranzi inopisa inobva kuzuva). Kunyange zvazvo mwero wokutsakatika usingagoni kuzivikanwa kubva muzvinyorwa zvezvisaririra zvoga, mienzaniso yakasiyana-siyana inoratidza kuti kutsakatika kwacho kwakanga kwakakurumidza zvikuru, kuchidzika kusvika kumaawa panzvimbo pemakore.  Mubvunzo: Kunyangarika kwedhinosaur sezvingabvira kwakaitika nemhaka yechiitiko chokurovera chinoitika kupi?
Yucatán Peninsula