Lignite is a sedimentary rock that still shows traces of plant structure. It is a coal with lower heating value.
It is a popular form of urban travel. The first trams were built in the 19th century to satisfy the increasing demand for public transport.
During the course of history, bridges were points of strategic importance. Today they have a significant role in infrastructure.
History is not always based on bare facts, sometimes serious research needs to be done to explore our past. People who do that are called archaeologists,...
Fossil-fuel power plants produce most of the world's electricity, but their efficiency is mediocre and they significantly pollute the environment.
These unique works of art are renowned and sought-after worldwide. It is not unusual to spend 5000 hours working on a single tablecloth.
In big cities, the park & ride service is gaining popularity. Passengers can get to their workplace in the town centre quite fast, avoiding traffic jams.
A summary of events right after the peace agreements that put an end to World War I.
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.
The continental climate zone is characterised by four seasons: hot summer, cold winter and two transitional seasons in between.
A cuboid is a polyhedron with six rectangular faces.
This animation demonstrates the different nets of a cuboid and includes a game.
Greece is considered one of the cradles of European culture. Today, its key sector is undoubtedly tourism.
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...
Within the lethal embrace of deserts, life can only flourish because of large springs. Here plants thrive, animals enjoy something to drink, caravans can...