Structure of nitrogen molecules

This animation demonstrates the structure of nitrogen molecules, with one sigma and two pi bonds holding the atoms together.

The human blood

Human blood consists of blood cells and plasma.

Prenatal development

This animation demonstrates the development of the human embryo and foetus.

Diesel engine

The German engineer Rudolf Diesel patented the diesel engine in 1893.

Hydroelectric power plant (Hoover Dam, USA)

The huge dam built on the Colorado river in the US was named after a former American President.

Daguerreotype

The first commercially successful technique of photography was invented by the French Louis Daguerre.

Geographical discoveries (15th-17th century)

Legendary geographical discoveries at the beginning of the Modern Age had not only redrawn maps, but also had a truly diverse impact.

Covalent bonds in benzene molecules

In benzene there are sigma bonds and delocalised pi bonds between carbon atoms.

Earth

The Earth is a rocky planet with a solid crust and oxygen in its atmosphere.

Life cycle of mosses and ferns

This animation compares the life cycles of mosses and ferns, helping to understand the general life cycle of plants.

Roman soldier (1st century BC)

Mercenaries of the ancient Roman army were well-trained and well equipped with the most up-to-date weapons.

Change of seasons (intermediate)

Due to the Earth´s tilted axis, the angle of the Sun's rays at given latitudes continuously changes during the year.

Countries of the World

Learning about the geographic location, capitals and flags of the world´s countries through exercises in three levels of difficulty.

Interesting astronomy facts

This animation presents some interesting facts in the field of astronomy.

The spread of Homo sapiens on Earth

The 'wise man' originated in Africa and dispersed throughout most of the continents.

Mount Rushmore (USA)

Carved into a granite cliff, the sculptures of the Mount Rushmore National Memorial depict four great United States presidents.

The New Horizons mission

The New Horizons space probe was launched in 2006, with the objective to study Pluto and the Kuiper Belt.

Terms of physical geography

This animation demonstrates the most important relief features, surface waters and their relevant symbols.

Construction of cars

This animations demonstrates the exterior and interior construction of cars, as well as their operation.

The Black Death (Europe, 1347–1353)

The bacterial disease known as the bubonic plague is one of the deadliest infectious diseases in the history of mankind.

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