Eratosthenes

The circumference of the Earth has already been calculated in ancient Egypt. The calculations turned out to be rather accurate, considering the conditions of the time.

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Cloud formation, types of clouds

Evaporating surface water forms clouds of various shapes from which water falls back to...

El Niño

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

El Niño

Az El Niño jelensége szinte az egész Föld éghajlatára hatással van.

Folding (basic)

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

Karstification

The dissolution of limestone results in the development of karst formations.

The subtropics

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

Polluting natural waters

Water is one of our key natural resources; we must protect it vigorously.

The path of bauxite

Bauxite is a raw material in aluminium production. Watch this video to learn how the well-known...

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