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Water on Earth is in a continuous state of change. The water cycle includes processes...
The animation presents the largest mountains, plains, rivers, lakes and deserts of the Earth.
Tectonic plates can move in relation to each other.
Learn about animal species that emerged in the distant past and stayed mostly unchanged
Karst formations include dolines and dripstones.
The rise and drop of sea levels caused by the gravitational force of the Moon.
Water is one of our key natural resources; we must protect it vigorously.