Volcanic activity

This animation demonstrates different types of volcanic eruptions.

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Layers of the ocean

Physical properties, as well as the flora and fauna of the ocean change with depth.

Solar eclipse and lunar eclipse

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

Eroded fault-block mountains

We can come across the remains of the Variscan and Caledonian mountain systems almost anywhere...

Continental drift

In the past, a number of geologists tried to explain why the outlines of continents seem to fit...

Eratosthenes

The circumference of the Earth has already been calculated in ancient Egypt. The calculations...

How lakes disappear

On a geological time scale lakes are short-lived.

The phosphorus cycle

The phosphorus cycle describes the movement of phosphorus through the lithosphere,...

Folding (intermediate)

Lateral compressive forces cause rocks to form folds. This is how fold mountains are formed.

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