Mining is an important sector of the economy but it can cause irreversible damage to the environment.
Pines are conifer trees characteristic of the taiga. The timber of pine trees is a popular raw material in the furniture industry.
A summary of events right after the peace agreements that put an end to World War I.
Electric current of small voltage can be created by using fruit, similarly to the Daniell cell.
The largest of the great apes. During evolution humans diverged from gorillas around 6 million years ago.
During evolution numerous creatures learnt to adapt to their environment, for example by camouflage.
The lakes of Scandinavia were formed during the Ice Age by glacial erosion.
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.
There are a number of Viking stave churches in Norway that were once erected in honour of Viking gods.
The terrestrial planets in our Solar System are the four planets closest to the Sun. They are made up of rocks and metals and have hard surfaces.
Can a candle be re-lit if the flame of the match does not even touch it?
Make a magnifying glass using a jar, some cling foil and a few drops of water.
How can a tin can be crushed without manual force? All you need is some water and heat.
These unique works of art are renowned and sought-after worldwide. It is not unusual to spend 5000 hours working on a single tablecloth.
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.
After the first oil crisis in 1973, trolleybuses gained popularity in urban transport systems since their operation does not depend on the price of crude oil.
The rolling highway (Rollende Landstrasse) is an environmental friendly way of transport where lorries are transported by trains.
Let's visit Prague, the capital of the Czech Republic and learn about its sights and the world famous Czech beer.
This species is an excellent example for symbiosis. Living together with sea anemones they keep predators away.
The establishment of Stalin’s dictatorial regime and its consequences.