Mercenaries of the ancient Roman army were well-trained and well equipped with the most up-to-date weapons.
The ancient Roman arena became well-known for the chariot races held here.
The theatre that has a distinctive shape and excellent acoustics was situated at the side of the Acropolis in Athens.
Water on Earth is in a continuous state of change. The water cycle includes processes such as evaporation, precipitation, melting and freezing.
Vertical forces can break up layers of rock into fault blocks, which then move vertically along the fracture planes.
Tectonic plates can move in relation to each other.
The step pyramid, built in the 27th century BC, was the first pyramid in Egypt.
The excellent road and aqueduct system covering the whole empire reflects well the development of the Roman civilisation.
The ´Temple of all gods´ was built during the reign of the Roman Emperor Hadrian.
At the end of the 18th century, mining boomed because of the great need for raw materials in the dynamically developing industry.
Chess games can help to develop logic skills.
This animation demonstrates the structure and operation of hair dryers.
A spectacular demonstration of algebraic expressions.
Studying Ceres and Vesta will help us learn more about the early history of the Solar System and how rocky planets are formed.
3-dimensional Cartesian coordinate system with illustrations and exercises that develop spatial perception.
The ancient Inca city, located in present-day Peru, is a World Heritage Site.
This animation shows the electron configuration of the calcium atom.
A phase transition is the change of a substance from one state of matter to another.
This animation demonstrates the structure of nitrogen molecules, with one sigma and two pi bonds holding the atoms together.
Legendary geographical discoveries at the beginning of the Modern Age had not only redrawn maps, but also had a truly diverse impact.