Mu 2010, pomwe katswiri wamiyala Amilcar Adamy wochokera ku Brazilian Geological Survey adaganiza zofufuza mphekesera za phanga lachilendo ku Rondonia, kumpoto chakumadzulo kwa Brazil, adapeza kupezeka kwa mabowo akuluakulu.
M'malo mwake, ofufuza anali atapeza kale manda ambiri ofanana ku South America onse omwe ndi akulu kwambiri komanso omangidwa bwino, mukhululukidwa chifukwa choganiza kuti anthu amawakumba ngati njira yodutsa m'nkhalango nthawi yakale.
Komabe, ndi akale kwambiri kuposa momwe amawonekera, akuti ali ndi zaka pafupifupi 8,000 mpaka 10,000, ndipo palibe njira yodziwika bwino ya geologic yomwe ingawafotokozere. Koma palinso zikhadabo zazikulu zomwe zimakhoma pamakoma ndi kudenga - tsopano akuganiza kuti mitundu yakutha ya sloth ground sloth ili kumbuyo kwa zina zotchedwa palaeoburrows.
Ofufuzawa adziwa za ma tunnel awa kuyambira zaka za m'ma 1930, koma nthawi imeneyo, amawerengedwa ngati mtundu wina wamabwinja - zotsalira za mapanga osemedwa ndi makolo athu akale, mwina.
Phanga lomwe lili m'chigawo cha Rondonia linali lalikulu kwambiri, ndipo ndi palaeoburrow wodziwika kwambiri ku Amazon, ndipo ndi lokulirapo kuwirikiza kawiri palaeburrow wachiwiri wamkulu ku Brazil.
Pali ma palaeoburrows oposa 1,500 omwe amadziwika kumwera ndi kumwera chakum'mawa kwa Brazil kokha, ndipo zikuwoneka kuti pali mitundu iwiri yosiyana: yaying'ono, yomwe imafika mpaka 1.5 mita m'mimba mwake; ndi zazikuluzikulu, zomwe zimatha kutambasula mpaka 2 mita kutalika ndi 4 mita m'lifupi.
Pamakoma osanja ndi amkati, ofufuza adapeza chidziwitso chawo chachikulu chazomwe zingapangitse kuti apange zomangamanga - malo ophatikizika amiyala yamiyala, basalt, ndi miyala yamchenga, yomwe amadziwika kuti ndi cholembera cha cholengedwa chachikulu chakale.
Ambiri amakhala ndi mizere yayitali, yosaya yofanana, yokhazikitsidwa komanso yopangidwa ndi zikhadabo ziwiri kapena zitatu. Ma grooves amenewa amakhala osalala, koma ena osakhazikika mwina adapangidwa ndi zikhadabo zosweka.
Kupeza kumeneku kumawoneka ngati kuyankha limodzi la mafunso omwe akhala akupezeka kale palaeontology okhudzana ndi megafauna wakale yemwe amayenda padziko lapansi nthawi ya Pleistocene, kuyambira zaka 2.5 miliyoni zapitazo mpaka zaka 11,700 zapitazo: Kodi mabowo onse anali kuti?
Kutengera kukula kwa nyumbazo komanso zilembo zamakhola zomwe zatsalira m'makoma awo, ofufuza tsopano ali ndi chidaliro kuti apeza maenje a megafauna, ndipo achepetsa eni malowo kukhala ma sloth apansi ndi ma armadillos akuluakulu.
Malingana ndi iwo, palibe zochitika padziko lapansi zomwe zimapanga tunnel tating'onoting'ono tating'onoting'ono kapena tating'onoting'ono tating'onoting'ono, tomwe timakhala ndikunyamuka ndikugwa, ndikulemba pamakoma.
Pansipa pali chidule cha chithunzi cha m'mene kukula kwa ngalande zosiyanasiyana zikufanana ndi mitundu yodziwika ya ma armadillos akale ndi ma sloth:
Ofufuzawo akuganiza kuti ma palaeoburrows akulu kwambiri adakumbidwa ndi ma sloth ofunda aku South America ochokera kumtundu wa Lestodon womwe unatayika.
