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 was born in 1918. He was in prison from 1962 to 1990. He became President of South Africa in 1994, and retired in 1999. Nelson Mandela died on 5 December 2013 following a lung illness. leader of his people. Nelson Mandela was the first black President of South Africa. He spent 27 years in prison for trying to overthrow the pro-apartheid government.