Volcanic activity

This animation demonstrates different types of volcanic eruptions

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Greenhouse effect

Human activity increases the greenhouse effect and leads to global warming.

El Niño

A periodic climate pattern that occurs across the tropical Pacific Ocean every five years.

Oxygen cycle

The oxygen cycle describes the movement of oxygen within its three main reservoirs.

Terms of physical geography

This animation demonstrates the most important relief features, surface waters and their...

Ocean currents

The Great ocean conveyor is a planet-wide system of ocean currents, which has a great...


An earthquake is one of the most devastating natural phenomena.

Nitrogen cycle

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

Milky Way

The diameter of our galaxy is about 100,000 light years; it contains more than 100...

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