Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: Sezvo iye akataura kuti aigona kudzora mafashamo eNire, akakokwa naFatimid Caliph al-Hakim kuitira kuti aone chirongwa chemvura paAswan. Zvisinei, Ibn al-Haytham akamanikidzwa kubvuma kuti basa rake rakanga risingaiti.  Mubvunzo: Ndokupi kwakataurwa kuti chirongwa chehydraulic chaizoburitswa?
Aswan