Radioactivity

The process of the decay of unstable nuclei is called radioactivity.

Inca warrior (15th century)

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

Homo erectus

The ‘upright man’ used tools and could set fire.

Ancient Egyptian sailing boat

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

Ictíneo II submarine

The submarine designed by the Spanish inventor Narcís Monturiol was a pioneering work in the history of underwater navigation.

Vision correction

Concave and convex lenses are used for the correction of short-sightedness and far-sightedness.

English battleship (18th century)

English sailing ships were among the best ships in the 17th-19th centuries.

Conquistador (16th century)

Spanish conquerors owed their success to their armour and firearms.

Public school in Central Europe (early 20th century)

Public schools in villages played an important role in education.

Ottoman soldiers (16th century)

The Ottoman army included janissaries (paid warriors) and sipahis (vassal knights).

Seeds and germination

Dicotyledons have two embryonic leaves (cotyledons), while monototyledons have only one.

Abbey of Saint Gall (11th century)

The building complex was one of the most important Benedictine abbeys for centuries.

Aztec warriors (15th century)

The fearsome looking Aztec warriors could not stop the Spanish conquistadors with their primitive weapons.

Battle of Kadesh (1285 BC)

The outcome of one of the greatest battles in the history of the ancient East (fought by the Egyptians and Hittites) was indecisive.

Louis XIV (the Sun King)

The French monarch got his epithet because of his opulent and extravagant lifestyle.

Medieval keep

Keeps were typical buildings in the Middle Ages, also built independently from castles.

Tutankhamun’s tomb (14th century BC)

One of the greatest archaeological finds of the 20th century was the tomb of the Egyptian pharaoh.

Cube (exercises)

Edges, diagonals and faces of a cube can be identified by its vertices.

The history of aviation

The animation offers a summary of the history of aviation from the Middle Ages.

Battle of Salamis (480 BC)

The Greek fleet owed their success to their good tactics and their fast and easily manoeuvrable ships.

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