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.
The evolution of Nelson Mandela â South African President Frederik de Klerk, right, and Mandela shared a Nobel Peace Prize in 1993 for their work to secure a peaceful transition from apartheid rule.