This class in the animal kingdom has the highest number of species. More than half of all known animal species, (more than 1 million) belong here.
Sometimes it feels nice just to have a stroll or relax under in the shades of the trees in a grove. It is important that we find time for relaxation.
The largest cities in the world are often characterised by congestion and high population density.
Industrial parks on the outskirts of towns have a huge economic potential. It is more worthwhile to build a factory in an industrial park than far away from it.
The stage of development of a region's infrastructure reflects the economic development of that area.
The phrase 'if it's not on the Internet it doesn't exist', has become almost a cliché. Internet has a growing influence on our lives: this is where we shop,...
This video demonstrates the expansion of gases with the help of a bottle and a coin.
Santa Claus lives in Finland in the town of Rovaniemi on the Arctic Circle. Every year in December he departs from here on his journey around the globe.
Libraries have always been a vital part of the community. Beside access to books, modern libraries also provide access to digital resources, such as video...
Welding is a fabrication or sculptural process that joins materials, usually metals, by fusion.
Certain social groups are not able to break out of their lifestyle forced upon them by prejudices and discrimination, so their standard of living remains low.
When the population of a town increases drastically, mass housing needs can only be satisfied with cheap solutions.
Many people doubt their safety, others consider it practically the most economical source of energy.
Some power plants use fossil and renewable energy simultaneously.
Among the problems of a crowded metropolis are the surrounding slums, homelessness and air pollution.
After World War II, Germany was divided and the Iron Curtain was drawn.
In certain intersections traffic can be so heavy that safe crossing can only be ensured by traffic lights.
The buffalo is a much more powerful beast of burden than cattle, it can carry or draw much heavier loads.
This video shows why the Barbary sheep on the savannahs bear such a strong resemblance to goats.
Species of the Ursidae family can be found all around the world. They are mostly large-bodied with quite diverse diets.