Paper was invented more than two thousand years ago.

How does it work? - Record player

This animation demonstrates the mechanism and operation of record...

Fuel cell

A fuel cell provides environment-friendly electric energy produced...

Types of bridges

Types of bridges include beam-, arch-, suspension-, cantilever and...

How does it work? - CRT television

This animation demonstrates how a CRT television works.

Water turbine, generator

Water turbines convert the kinetic energy of water into electric...

How does it work? – Cinema projector

This animation demonstrates the design and operation of a...

Stirling engine - hot-air engine

Stirling engines are also known as external combustion engines....

Wankel engine

A type of rotary engine of high efficiency


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

Moon radar experiment (Zoltán Bay, 1946)

In 1946 a Hungarian scientist was the first person to detect radar...

How does it work? - Water tower

This animation demonstrates the structure of water towers.

Archimedes’ screw (3rd century BC)

The screw pump commonly attributed to Archimedes made irrigation...

How does it work? - Lift

This animation demonstrates how lifts work.

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

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

How does it work? - Radio

This animation demonstrates how radios work.

Printed circuit board

This animation demonstrates the structure of small, mass-produced...


Lighthouses are used as an aid to navigation in coastal waters.

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