Cliffs close cliffA vertical rock face. along the coastline do not erode at the same pace. A cliff is a steep rock face. When a stretch of coastline is formed from different types of rock, headlands ...
At 4,130 miles (6,650 km) long, the Nile in Africa is the longest river in the world. Some people consider the Amazon in South America to be longer. This is because the many hundreds of channels that ...
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