Blitzkrieg strategy (1939-1940)

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

Diversity of light-detecting organs

Several analogous types of eyes have developed independently through convergent evolution.

Soldiers of the American Civil War

The American Civil War was fought between the Confederacy and the Union.

Phonograph and gramophone

Edison´s invention records and plays sound from a cylinder, while Berliner´s apparatus uses a disc.

Leaning Tower of Pisa (14th century)

The medieval bell tower of the Cathedral of Pisa is the most famous leaning tower of the world.

Quinquereme (3rd century BC)

The warship having several rows of oars was the typical warship of the Hellenistic era.

MÁV M61 diesel engine (1963)

The legendary M61 class locomotives of the Hungarian State Railways were manufactured by Nohab.

Otto Lilienthal’s glider

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

How does it work? - Record player

This animation demonstrates the mechanism and operation of record players.

How does it work? - Air conditioner

An air conditioner cools the air inside by drawing heat away and releasing it outside.

USS Ohio (US, 1979)

Nuclear propulsion was first used by the US Navy for powering submarines in the mid-20th century.

Trilobites

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

Apatosaurus

Long-necked herbivorous dinosaur with a robust body.

Electric surface transport

Trolleybuses and trams are environment-friendly means of public transport

Road transport, articulated lorry

Articulated lorries play an important role in road transport.

Junction

Entertaining and spectacular animation to practise orientation in space.

How does it work? – Escalator

This animation demonstrates how an escalator works.

Cellulose (C₆H₁₀O₅)n

The building material of the cell walls and fibres of plants.

Enzymes

Enzymes are protein molecules catalysing biochemical reactions. Their activity can be regulated.

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