Optical isomerism

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

Chengdu J-20 Mighty Dragon (China, 2017)

The Chengdu J-20, also known as Mighty Dragon, is a multiple function stealth fighter aircraft.

Voyager space probes

The Voyager space probes were the first man-made objects to leave the Solar System. They gather data about outer space and carry information about humanity.

Cortical organisation of speech

Producing speech requires the synchronised operation of several cortical centres.

Land reclamation in the Netherlands, 17th century

Inhabitants of the northern part of the Netherlands have successfully fought the sea since the Middle Ages.

The city of Ur (3rd millennium BC)

The ancient city located near the river Euphrates was an important Sumerian centre.

Heart attack

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

The Knights Templar (12th-13th century)

One of the most important religious military orders, formed in the era of the Crusades.

European pond turtle

The animation shows the anatomy of turtles.

Ferrous metallurgy (intermediate)

Raw iron is produced from iron ore in iron smelters.

House without carbon-dioxide emission

The design and structure of modern houses play an important role in environmental protection.

Soap

Fatty acid molecules consist of a polar head and a non-polar tail, therefore they are suitable for removing fat stains.

Apoxyomenos

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

Chlorination of methane by a substitution reaction

During the substitution reaction the hydrogen atoms of methane are substituted with chlorine atoms, the by-product is hydrogen chloride.

Calcium carbonate (CaCO₃)

Limestone is a widely and diversely used material.

Passive house

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

3D Tangram

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

Tanning, skin cancer

The topmost layer of our skin is the epidermis, which contains melanocytes.

Ivan Meštrović: History of the Croats

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

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...

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