Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: A cikin 1972, masanin kimiyyar lissafi na Faransa Francis Perrin ya gano tsoffin tsoffin abubuwa goma sha biyar da ba su da aiki na nukiliya na nukiliya a cikin ragowar ma'adinai guda uku a ma'adinan Oklo a Gabon, Afirka ta Yamma, wanda aka sani da suna Oklo Fossil Reactors. Ma'adinan ma'adinai yana da shekaru biliyan 1.7; to, uranium-235 ya zama kusan kashi 3% na yawan uranium a duniya. Wannan ya isa ya ba da izinin ci gaba da halayen halayen nukiliya na nukiliya don faruwa, idan akwai wasu yanayin tallafi. Gwamnatin tarayya ta Amurka ta ambaci ikon da ke kewaye da shi don ƙunsar kayayyakin sharar nukiliya a matsayin hujja mai goyan baya ga yiwuwar adana man fetur na nukiliya a Yucca Mountain ajiyar sharar nukiliya.  Tambaya: Shekaru nawa ne ma'adinan ma'adinai?
Shekaru biliyan 1.7