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The origins of Christmas date back to ancient Rome. Decorating Christmas trees became popular in the early 19th century.

Nuclear power plant

Many people doubt their safety, others consider it practically the most economical source of energy.

Power plants

Some power plants use fossil and renewable energy simultaneously.

Problems of a metropolis

Among the problems of a crowded metropolis are the surrounding slums, homelessness and air pollution.


Northern countries are leaders in logging. Sweden and Finland for example not only produce, but also process timber.

Continental drift

In the past, a number of geologists tried to explain why the outlines of continents seem to fit together like pieces of a jigsaw puzzle. An answer was found...

Field horsetail

A perennial plant with a rhizomatous stem, the length of which may reach 2-3 m. The height of the plant above ground, however, is only 50-60 cm.

Birds of prey

This video is about birds of prey that hunt mainly vertebrates.


Summer is one of the four seasons of the temperate climate zone. The days are the longest and the weather is the hottest during this season.

Fluvial incision

Upper-course river features include V-shaped valleys, interlocking rapids and waterfalls.

Weather and climate

Climate is the typical weather of a certain region that changes practically only on a geological scale, whereas weather can change day by day.


Mosses are plants that can be found all over the world. It is an interesting fact that even after 400 years they are able to revive as soon as sunlight...


Mushrooms have a special role in the world of living organisms. Their most important task is to decompose organic, mainly plant materials.


The order with the largest number of bird species within the class Aves. Their common characteristic is that they use the syrinx at the base of their...


Water is a vital element for every living being. Let’s take a look at what happens when a thirsty plant is watered.

The Cold War unfolds

After World War II, Germany was divided and the Iron Curtain was drawn.


Hiking is a popular leisure activity that can provide fun both in winter and summer. At dangerous places it is advisable to hire a guide.

Finnish industrial areas

Finland’s economy is based mainly on paper and wood industry but the manufacture of electronic goods is also an outstanding industrial field.

Rubbish dump

Rubbish dumps are usually located at smaller settlements with a small population, near larger towns.

Spoil heap

Mining is an important industrial activity, but it can cause irreversible damage to the environment and destroy the landscape.

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