The term 'jungle' is used to describe the dense vegetation in a tropical area. Jungles are mostly located in South-East Asia, Central and South America and...


This plant that originates from China has become an invasive species.

Salt music

Watch this video to find out whether tap water and table salt are able to conduct electricity.

Weather fronts

When masses of cold and warm air meet, weather fronts develop.

The Jovian planets

The four outer planets (Jupiter, Saturn, Uranus and Neptune) do not have solid surfaces, thus they are called gas giants.

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 clover

Thanks to its high nutritional value, the clover is an excellent fodder plant; four-leaved clovers are a real rarity and are thought to bring luck.

The Gregorian calendar

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

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.


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


One of the most common types of Anatidae, the ancestor of the domestic duck.

The giraffe

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

Peeling an egg

The acid in vinegar dissolves materials containing calcium carbonate like eggshell and snail shell.


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


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.


King of the savannahs, the lion is at top of its food chain. Its only enemy is man.

Views of Lake Balaton

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

Added to your cart.