Mesopotamian inventions (3rd millennium BC)

These tools, revolutionary even in their simplicity, are still in use today.

Types of dentition in mammals

The dentition of different species of mammals reflect their feeding habits.

Stegosaurus

A type of prehistoric reptile having bony plates on its back, which aided thermoregulation.

How does it work? - LCD screens

A liquid-crystal display utilises the light modulating properties of liquid crystals.

How does it work? - Plasma display television

This animation explains how a plasma display television works.

How does it work? - CRT television

This animation demonstrates how a CRT television works.

Emperor penguin

Penguins are birds living in the Antarctic and adapted to cold temperature and swimming.

Hard disk drive

Computer hard disk drives are devices of magnetic data storage.

Transformer

A transformer is a device used for converting the voltage of electric current.

Passive house

In a passive house a comfortable inner temperature can be ensured without the use of traditional heating and cooling systems.

Heart attack

The cause of a heart attack is the blockage of a coronary artery. It is one the most common causes of death.

Optical isomerism

Mirror image isomers of asymmetrical shapes and solids are non-superimposable.

Torii (gateway) of the Itsukushima Shrine

The torii is a traditional Japanese gate built at the entrance of shrines.

Stirling engine - hot-air engine

Stirling engines are also known as external combustion engines. Unlike internal combustion engines (e.g. Otto-engine), here combustion takes place outside...

Apoxyomenos

The characteristic ancient Greek statue was found on the bottom of the Adriatic Sea.

Ivan Meštrović: History of the Croats

One of the Croatian sculptor's most famous works depicts a woman wearing a traditional costume.

3D Tangram

A special, 3D version of the well-known Chinese logical game.

How does it work? - Differential gear

A differential allows the driven wheels of a car to rotate at different speeds when the car is turning.

Stag beetle

With the example of the stag beetle we demonstrate how insects' muscles function, how insects fly and how they reproduce.

European badger

The European badger is an omnivorous, nocturnal animal. Badger colonies live in large burrow systems, called setts.

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