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.
Date of birth: 18 July 1918, Mvezo, Transkei. Nelson Rolihlahla Mandela was born on 18 July 1918 in the small village of Mvezo, on the Mbashe River, district of Umtata in Transkei, South Africa. The name Nelson was not given until his first day at school.