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An Event of Imagination　　

The year is 2094. It has been announced that a comet is heading towards the Earth. Most of it will 　　

miss our planet, but two pieces will probably hit the southern half of the Earth.　　

On 17 July, a piece four kilometers wide enters the Earth's atmosphere with a massive explosion. 　　

About half of the piece is destroyed, but the remaining part hits the 　South Atlantic　 at 200 times the speed of sound. The sea boils and a huge hole is made in the seabed. Huge waves are created and spread outwards from the hole. The wall of water, a kilometer high, rushes towards southern 　Africa　 at 800 kilometers an hour. Cities on the African coast are totally destroyed and millions of people are drowned.　　

Before the waves reach South America, the second piece of the comet lands in 　　Argentina　　.