ATP is the main source of energy for cells.

Provinces and settlements of Ancient Rome

This animation presents the history of Ancient Rome throughout the centuries.


NAD⁺ is a coenzyme that plays an important role mainly in catabolic processes, while NADP...

How does it work? - Escalator

This animation demonstrates how an escalator works.

Tooth brushing

Careful tooth brushing is an important part of oral hygiene.

Endocrine system

Glands of the endocrine system secrete hormones into the blood.


The zygote is the initial cell formed when two gamete cells are joined by means of sexual...

Interesting geography facts – Physical geography

This animation presents some interesting facts in physical geography.

Electric surface transport

Trolleybuses and trams are environment-friendly means of public transport

Female reproductive system (intermediate)

The reproductive system is a series of organs working together for the purpose of...


A group of fish characterised by a cartilaginous skeleton, well-known species include the...

The Mongol Empire

The legendary Mongol ruler Genghis Khan established a huge empire through his conquests.

The Macedonian Empire

The legendary ruler and military leader, Alexander the Great, established a vast empire.

Turkish bath (16th century)

One of the positive influences of the Ottoman invasion of Europe was the construction of...


A fjord is a long, narrow inlet with steep sides, created in a valley carved by glacial...

Jameh Mosque (Isfahan, 15th century)

Its architectural solutions and ornamentation rank this mosque among the masterpieces of...

Typical dwelling types

Every era and every culture has specific residential buildings.


Modern Slavs live in 14 European countries that can be classified into 3 groups.

Battle of Thermopylae (480 BC)

The battle of the Greek-Persian War became famous for the heroic sacrifice of the Spartan...


The last Ice Age ended about 13 thousand years ago.

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