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.
Mandelaâs other key legacy is his extensive charitable work, including the creation of the Nelson Mandela Foundation, the Nelson Mandela Childrenâs Fund and 46664 â the HIV-AIDS initiative named after his prison number.