Aluminium is a good electrical conductor and is often used in electrical transmission lines. It is cheaper than copper and weight for weight is almost twice as good a conductor. When evaporated in a vacuum, aluminium forms a highly reflective coating for both light and heat.
Nelson Mandela had a large family and had 13 brothers and sisters.  Of all of his siblings, he had one full brother and one half  brother.
Nelson Mandela: Before Prisoner, Beyond President. 1  Nomzamo Winnie Madikizela.  July 18th, 1918: Rolihlahla Dalibhunga Mandela is born into the Madiba clan, a cadet branch of the Thembu royal family, in the small village of Mvezo, in the Transkei, South Africa. 1927: When his father Gadla Henry Mphakanyiswa dies, he is placed under the guardianship of the Thembu Regent, Jongintaba Dalindyebo.