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.
Examples of large waterfalls * Angel Falls, the world's highest at 979 m (3212 ft), in Venezuela * Tugela Falls, the world's second highest at 947 m (3110 ft), in KwaZulu-Natal province, Republic of South Africa. * Ramnefjellsfossen, the world's third highest at 808m (2685 ft), at Stryn, Nesdalen, Norway.