The Eye of the Sahara (Richat Structure) is a giant geologic dome 50 km wide — visible from space.
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The deepest lake in the world is Lake Baikal in Russia — it reaches a depth of over 5,300 feet.
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The Phoenician city of Tyre was built on an island.
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The Andes mountains were formed by tectonic activity.
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The longest river in the world is often considered to be the Nile.
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Ancient volcanic eruptions shaped prehistoric environments.
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The Earth is about 4.5 billion years old.
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Hawaii is moving toward Japan at about 3 inches per year.
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The border between Belgium and the Netherlands runs through a bar in the town of Baarle-Hertog.
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