Refugees and migrants

This animation presents the current refugee crisis from various...

Carbon monoxide (CO) (intermediate)

Colourless, odourless gas, highly toxic to humans and animals in...

Mir Castle Complex (17th century)

The Mir Castle Complex, situated in the town of Mir, Belarus was...

Сенки

Change of light conditions in different seasons. Measuring height...

Carbonate ion (CO₃²⁻)

A compound ion produced from carbonic acid by releasing protons.

Scythian 'golden man' (3rd century BC)

The wearer of the armour found at the archaeological dig of the ...

The castle of Eger (16th century)

The castle of Eger got its final shape and became an important...

Bayterek (Astana, 1997)

The tower situated in the capital city of the Kazakh Republic...

Medieval Arab torpedo (Hassan Al Rammah, 13th century)

The medieval Arab inventor, Hassan Al Rammah designed the world's...

Medieval Arab water pump (Al-Jazari, 13th century)

The ingenius water pump designed by Al-Jazari is a great example...

Market town (Kingdom of Hungary)

Market towns became the most common type of towns in the Kingdom...

Persian pontoon bridge (5th century BC)

King Darius as well as Xerxes built pontoon bridges across the...

Firearms

Competing with each other in the 19th and 20th centuries, the...

Танкове (I-ва Световна война)

Танковете, разработени в средата на първото десетилетие на 20-ти...

Relative position of lines and planes

This animation demonstrates the relative position of lines and planes.

Messerschmitt Bf 109 G (Germany, 1941)

A legendary fighter plane used by the German air force in World...

U-2 ’Dragon Lady’ (USA, 1957)

The efficient reconnaissance aircraft has been used by the CIA...

Four colour theorem

Colour a map with the fewest number of colours possible, so that...

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