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The Andes were formed by the collision of two tectonic plates, one oceanic and one continental.
The El Niño phenomenon has a great effect on the Earth's climate.
Icebergs are blocks of frozen freshwater floating in the sea.
The weather can be forecast with different meteorological instruments.
Is the tundra region as cold and deserted as many people think?
This animation demonstrates the most important relief features, surface waters and their...
Karst formations include dolines and dripstones.
The dissolution of limestone results in the development of karst formations.