The terrestrial planets

Mercury, Venus, Earth and Mars may have they formed in much the same way, but only the Earth is lucky enough to be in the habitable zone.

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The work of glaciers

A glacier is a large body of ice in constant, slow motion down a hillside.

Waterfall

Waterfalls form where the river flows over a steep precipice in its course.

Solar eclipse and lunar eclipse

We can observe quite interesting astronomical phenomena when the Earth, the Sun and the Moon align.

How lakes disappear

On a geological time scale lakes are short-lived.

Local winds

The most important types of local winds are the sea-land breeze, the mountain-valley...

Weather and climate

Climate is the typical weather of a certain region that changes practically only on a geological...

The subtropics

The subtropics are located between the tropical and temperate zones, between 23.5° and 40°...

Nitrogen cycle

Atmospherical nitrogen is bound by bacteria and used by living organisms in the form of...

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