Saint Basil's Cathedral (Moscow, 16th century)

The church consecrated to Saint Basil was commissioned by Ivan the Terrible.

Blitzkrieg strategy (1939-1940)

This effective strategy was based on the fast and synchronised attack of different branches of the army.

Otto Lilienthal’s glider

The German engineer Otto Lilienthal was the first person to make successful flights with a glider designed by himself.

Inca warrior (15th century)

The Incas´ rudimentary weapons were inadequate in their struggle against the Spanish Conquistadors.

Byzantine Emperor (6th century)

The Byzantine Emperor was the head of the Byzantine Empire, the direct continuation of the Roman Empire.

Underground coal mining

As opposed to opencast mines, in underground mines the layers covering coal are not removed, coal is extracted from mine shafts.

Aztec ruler (15th century)

The Aztec Empire was a despotic, militaristic state ruled by the tlatoani.

Weightlessness

A spacecraft on its path is in a constant state of free fall.

Ancient Egyptian sailing boat

The river and marine sailing boats of ancient Egypt were one-masted, oared boats

Sự hòa tan của hydro clorua (HCl) trong nước

Dung dịch hòa tan của hydro clorua trong nước được gọi là axit clohydric.

Junction

Entertaining and spectacular animation to practise orientation in space.

The skull and the spine

The two main parts of the central nervous system, the brain and the spinal cord are protected by the skull and the spinal column.

Bones of the lower limbs

Bones of the lower limbs are connected to the trunk by the pelvis.

Lute and hurdy gurdy

The earliest version of the lute appeared in ancient Mesopotamia.

The Battle of Jutland (1916)

The naval battle fought by the British Navy against the German Navy was the largest sea battle in World War I.

Solomon's Temple (Jerusalem, 10th century BC)

Solomon's temple became one of the most important symbols of Jewish architecture.

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