Thermometers

There are various types of instruments used for measuring temperature.

Ragusa (Croatia, 16th century)

Today called Dubrovnik, this Croatian city is known for its spectacular architecture and beautiful location.

Heart attack

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

Surface tension

Surface tension is the property of a liquid that allows it to obtain the smallest surface area possible.

Pula Arena (Pula, 1st century)

The Pula Arena, located in present-day Croatia, was one of the largest Roman amphitheatres in the Antiquity.

Waterfalls

Waterfalls form where a river flows over a steep precipice in its course.

Megalithic cultures in Europe

Structures consisting of enormous stone blocks, dating back thousands of years, are monuments of megalithic cultures.

Optical isomerism

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

Regular square pyramid

A regular square pyramid is a right pyramid with a square base and four triangular faces.

Hard disk drive

Computer hard disk drives are devices of magnetic data storage.

Ancient Greek pottery

The masterpieces of ancient Greek potters are important archaeological artefacts.

Nyderlandų administracinis žemėlapis

Ši animacija pristato Nyderlandų provincijas ir provincijų sostines.

Levels of biological organisation

This animation presents levels of biological organisation from the level of the individual organism to the level of cells.

Arabų karys (6 a.)

Lankas ir kardas buvo svarbiausi viduramžių arabų karių ginklai.

Hussite wagon fort

The Hussites mastered the use of war wagons in the 15th century.

Bizantijos imperatorius (6 a.)

Bizantijos imperatorius buvo Bizantijos imperijos, tiesioginės Romos imperijos tęsėjos, vadovas.

Actekų valdovas (XV a.)

Actekų imperija buvo despotiška, militaristinė valstybė, valdoma valdovo tlatoani ("karalius").

Axolotl

The axolotl, also known as Mexican salamander, is an amphibian species that keeps its gills even in adulthood.

Mongolų chanas (13 a.)

Didžiulės Mongolų imperijos valdovas buvo didysis chanas.

The sense organs

Organs that detect signals of the environment or of the body and transmit them to the brain as nerve impulses.

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