Karst region (intermediate)

Karst formations include dolines and dripstones.

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.

Phonograph and gramophone

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

Soldiers of the American Civil War

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

Road transport, articulated lorry

Articulated lorries play an important role in road transport.

Diversity of light-detecting organs

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

Blitzkrieg strategy (1939-1940)

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

MÁV M61 diesel engine (1963)

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

Apatosaurus

Long-necked herbivorous dinosaur with a robust body.

Electric surface transport

Trolleybuses and trams are environment-friendly means of public transport

Sharks

A group of fish characterised by a cartilaginous skeleton, well-known species include the great white shark and the great hammerhead shark.

Trilobites

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

USS Ohio (US, 1979)

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

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.

Otto Lilienthal’s glider

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

Junction

Entertaining and spectacular animation to practise orientation in space.

RNA

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

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