Cloud formation

When the temperature of the cooling air reaches dew point condensation occurs because air is unable to hold more water.

The terrestrial planets

Mercury, Venus, Earth and Mars may have they formed in much the same way, but only the Earth is lucky enough to be in the habitable zone.

The Gregorian calendar

Developed nearly 500 years ago, it is a variant of the Julian calendar. Today it is the most widely used calendar.

Silver birch

The primary forest tree of the Russian steppes. Its unique characteristic is the whitish-brownish, heavily cracked bark.

The moon

What secrets does the Moon have? Who were the first men on the Moon? You’ll find out everything from this video.

The meerkat

Curious little animal living in underground burrows in the African savannahs.

The snowy owl

This owl species living in the furthest northern regions of our planet has adapted brilliantly to the harsh conditions of the taiga and the tundra.

Predation

Predators on top of the food chain prey on other animals. Their relationship is hunter and hunted.

The giraffe

The tallest animal on the planet, yet it has the same number of vertebrae as humans.

Weighing the Pythagorean theorem

In this experiment we provide proof of the well-known theorem of Pythagoras with a scale.

Sharks

The best known cartilaginous fish, sharks, do not chew their food; they use their razor-sharp teeth only for biting and tearing.

Dalmatia

A historic region of Croatia; its economy is mostly based on tourism and fishing.

The brachistochrone problem

Find out whether the marble reaches the finish line faster on the straight or on the curved slope.

Minerals

Rocks are a composed of minerals. These minerals can often be found in their pure forms.

Views of Lake Balaton

Lake Balaton is a tectonic lake located in Hungary. It is the largest lake in Central Europe.

Under the starry sky

Photos taken by professional cameras at a slow shutter speed can reveal details invisible to the naked eye.

Night in motion

Look up to the sky on a clear night at the time of the New Moon and enjoy the spectacular view of myriad of stars.

Ginkgo biloba

This tree is a truly living fossil: it has gone through only minor changes since the Mesozoic Era.

Common beech

This forest tree is a common tree species in hilly and mountainous regions. It prefers steep and shady slopes and tolerates colder climates.

Romanesque architecture

This architectural style is characterised by stubby, thick walls and round-arched windows. Numerous monasteries and churches were built in this style in the...

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