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. Nelson Rolihlahla Mandela is a well educated man. He is a great believer in education and life-long learning. It was at the Wesleyan mission school that he first attended that he was given the name Nelson. This formal schooling was not the only Mandela education though.