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Endocrine system

Glands of the endocrine system secrete hormones into the blood.

Trilobites

The ancestors of Arachnida and Crustacea belonged to the class Trilobita.

Provinces and settlements of Ancient Rome

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

Papermaking

Paper was invented more than two thousand years ago.

Oil tanker

Oil tankers appeared in the late 19th century; today they are among the largest ships.

Slavs

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

The Macedonian Empire

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

The Mongol Empire

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

Modern empires

Numerous legendary empires were built (and destroyed) in the course of history.

Hunebeds

These special dolmens located in present-day Netherlands were built about 5,000 years ago.

Legendary ancient empires

Numerous legendary empires were built (and destroyed) in the course of history.

The countries of Africa

Learning about the geographic location, capitals and flags of African countries through...

Държавите в Европа

Анимацията ще ни помогне да се запознаем с държавите в Европа, техните столици и...

Fullerene (C₆₀)

A crystalline allotrope of carbon which was discovered at the end of the 1980s.

RNA

A polynucleotid made up of phosphoric acid, ribose, and nucleobases (cytosine, uracil,...

Topography of the Earth

The animation presents the largest mountains, plains, rivers, lakes and deserts of the Earth.

Hussite wagon fort

The Hussites mastered the use of war wagons in the 15th century.

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