There are two ways that a supernova happens. A Type I supernova occurs when a star accumulates too much matter from nearby stars. Eventually, this leads to a nuclear reaction. A Type II supernova occurs after a star runs out of nuclear fuel and the force of its own gravity becomes too much.
Zambezi River, bordering Zimbabwe and Zambia. Considered the largest waterfall in the world, Victoria Falls thunders obnoxiously in Southern Africa. A Scotsman named David Livingston discovered the falls around 1855 and named them after then-queen Victoria.
Tugela Falls in South Africa are currently recognised as the world's second highest waterfall in terms of overall height (although there are doubts over the measurement of the Angel Falls, regarded as the highest â see Highest Waterfall in the World). Without doubt Tugela are, however, the tallest waterfalls in Africa. Located in the Drakensberg in the Royal Natal National Park in KwaZulu-Natal Province, they are one of the more accessible of Africaâs great waterfalls. The total drop in five leaping cascades is 948 metres.