Armenia · Mountains
Geography of Armenia: Mountains, Rivers, Climate & Regions
Armenia (the modern Republic of Armenia in the South Caucasus) is compact on a world map—about 11,484 square miles (29,743 square kilometers)—but it behaves…
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Landforms
Water Erosion Landforms: Rivers, Rain, and Flowing Water
Water erosion landforms are the shapes made when moving water removes rock or soil and carries it away. Rivers carve valleys and gorges. Storm…
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Landforms
Landforms Created by Erosion: Types, Processes, and Examples
A cliff face that looks freshly cut, a valley narrowed into a gorge, a desert ridge shaped like it’s been sanded into alignment—erosion leaves…
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Borders
Countries Whose Borders Change Every Year (Due to Rivers)
Some river borders can shift when a treaty makes the boundary follow a changing channel, but the countries discussed here do not all gain…
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Jordan · Lakes
Jordan River & the Dead Sea: How the River Feeds a Salt Lake
The Jordan River threads south from the snows of Mount Hermon to the lowest land on Earth, the Dead Sea—about 251 kilometers (156 miles)…
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Rivers
Longest River in the World: The Nile
From East Africa’s lake-fed headwaters to Egypt’s Mediterranean delta, the Nile connects contrasting landscapes and societies. Understanding its length means separating one continuous river…
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Countries & regions
What is the biggest country without a river?
Saudi Arabia is the world’s largest sovereign country without a permanent natural river. It covers about 830,000 square miles (2.15 million square kilometers), yet…
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