Lignite is a sedimentary rock that still shows traces of plant structure. It is a coal with lower heating value.
During the course of history, bridges were points of strategic importance. Today they have a significant role in infrastructure.
A lake is a body of still water surrounded by land. The majority of lakes contain freshwater. On a geological scale their lifespan is relatively short.
Are you curious how our digital materials are made? Go behind the scenes.
The continental climate zone is characterised by four seasons: hot summer, cold winter and two transitional seasons in between.
The evaporation of seawater provides an excellent opportunity for coastal countries to produce salt.
Let’s make paper birds! The more colour we use, the more beautiful our birds will look.
A century of war between England and France marked the end of medieval European society.
Within the lethal embrace of deserts, life can only flourish because of large springs. Here plants thrive, animals enjoy something to drink, caravans can...
The ramson is also called bear’s garlic, but do bears really like it? You can find out here and learn more about this plant that has medicinal properties...
Going to the beach on a sunny day is a pleasant way of relaxation for many people.
Greece is considered one of the cradles of European culture. Today, its key sector is undoubtedly tourism.
A cuboid is a polyhedron with six rectangular faces.
This animation demonstrates the different nets of a cuboid and includes a game.