Wikipedia:Àwọn Ìṣẹ̀lẹ̀ Bíi Ọjọ́ Òní/Ọjọ́ 23 Oṣù Kejì
- 1941 – Plutonium (a button of the metal pictured) was first chemically identified by chemist Glenn T. Seaborg and his team at the University of California, Berkeley.
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- 1868 - W. E. B. Du Bois (foto), aseoro-awujo ati alakitiyan eto araalu ara Amerika (al.1963)
- 1883 – Karl Jaspers, German philosopher (d. 1969)
- 1924 – Allan McLeod Cormack, South-African born physicist, Nobel laureate (d. 1998)
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