A nazarin kwanan nan ta gano cewa sandunan maganadisun duniya sun yi juyi kimanin shekaru 40,000 da suka gabata, a wani lamari da ya biyo bayan canjin muhalli na duniya da halakar da mutane a tsakanin sauran mahimman abubuwan. Wanda kuma wataƙila ya ba da gudummawar ƙarshe ga lalacewar Neanderthals.
Masu binciken da suka gudanar da binciken sun yi amfani da radiocarbon da aka adana a cikin zoben tsoffin don ragewa zuwa lokacin da filin magnetic na Duniya ya juye kuma iskar hasken rana ta rubuta canje -canje. Lokaci a Duniya shekaru 42,000 da suka gabata ya kasance mai rikitarwa, tare da yalwar guguwa ta wutar lantarki, auroras da radiation na sararin samaniya da ke ratsa sararin samaniya.
Masu bincike a UNSW Sydney da Gidan Tarihi na Kudancin Ostiraliya sun jagorance su, binciken tsabar kuɗin lokacin mai haɗari 'Adams Transform Geomagnetic Event' ko kuma kawai, 'Adams Event'.
A cewar wani Bayanin UNSW na binciken, sunan haraji ne ga marubucin almarar kimiyya Douglas Adams, wanda ya rubuta cewa '42' shine "amsar ƙarshe ga rayuwa, sararin samaniya, da komai" a cikin jerin litattafan almara na kimiyya The Hitchhiker's Guide to the Galaxy.
Bishiyoyi suna adana bayanan ayyukan yanayi a cikin 'zoben girma' na shekara -shekara yayin da suka tsufa. Masu binciken sun yi nazarin zoben wasu tsoffin itatuwa. A wannan yanayin, an yi nazarin bishiyoyin kauri na New Zealand, waɗanda aka adana su a cikin gurɓataccen iska sama da shekaru 40,000 kuma suna raye yayin taron Adam.
Isotope na Carbon-14, ko radiocarbon, ba kasafai ake samun sa ba a yanayi da yawa. Jagorancin karuwar matakan radiocarbon kimanin shekaru 40,000 da suka gabata, masana kimiyya sun sami damar yin zamani da auna hauhawar raƙuman rediyo na yanayi daga rushewar filin maganadisun Duniya.
Duk da cewa an san sandunan maganadisun sun yi birgima na ɗan lokaci kusan shekaru 41 ko 42,000 da suka gabata a wani taron da ake kira 'Laschamps Excursion', masana kimiyya ba su san yadda hakan ya shafi rayuwa a doron ƙasa ba, idan da kaɗan, sanarwar ta ci gaba.
Bayan tabbatar da taga lokacin taron Adams, ƙungiyar ta kwatanta canje -canjen da aka gani a cikin yanayi a duk faɗin duniya a lokaci guda. Sun gano cewa megafauna a duk faɗin ƙasar Ostiraliya da Tasmania sun ɓace a lokaci guda shekaru 42,000 da suka gabata. Hakanan, masu binciken sun yi imanin cewa taron na iya yin bayanin lalacewar Neanderthals da bayyanar kwatsam a cikin kogo a duniya.
Sirrin shine cewa sandar arewa ta duniya (geomagnetic) tana ci gaba da tafiya a kilomita 50-60 a kowace shekara, amma babu wanda ya san dalilin hakan. Matsayinsa ya ɗan canza kaɗan tun lokacin da aka gano shi, kuma a halin yanzu yana kan Tsibirin Ellesmere, a ƙetaren Nares Strait daga Greenland. Bugu da ƙari, asalin filayen magnetic na Duniya har yanzu babban asiri ne.
