This animation demonstrates the structure of nitrogen molecules, with one sigma and two pi bonds holding the atoms together.
Human blood consists of blood cells and plasma.
This animation demonstrates the development of the human embryo and foetus.
The German engineer Rudolf Diesel patented the diesel engine in 1893.
The huge dam built on the Colorado river in the US was named after a former American President.
The first commercially successful technique of photography was invented by the French Louis Daguerre.
Legendary geographical discoveries at the beginning of the Modern Age had not only redrawn maps, but also had a truly diverse impact.
In benzene there are sigma bonds and delocalised pi bonds between carbon atoms.
The Earth is a rocky planet with a solid crust and oxygen in its atmosphere.
This animation compares the life cycles of mosses and ferns, helping to understand the general life cycle of plants.
Mercenaries of the ancient Roman army were well-trained and well equipped with the most up-to-date weapons.
Due to the Earth´s tilted axis, the angle of the Sun's rays at given latitudes continuously changes during the year.
Learning about the geographic location, capitals and flags of the world´s countries through exercises in three levels of difficulty.
This animation presents some interesting facts in the field of astronomy.
The 'wise man' originated in Africa and dispersed throughout most of the continents.
Carved into a granite cliff, the sculptures of the Mount Rushmore National Memorial depict four great United States presidents.
The New Horizons space probe was launched in 2006, with the objective to study Pluto and the Kuiper Belt.
This animation demonstrates the most important relief features, surface waters and their relevant symbols.
This animations demonstrates the exterior and interior construction of cars, as well as their operation.
The bacterial disease known as the bubonic plague is one of the deadliest infectious diseases in the history of mankind.