When the temperature of the cooling air reaches dew point condensation occurs because air is unable to hold more water.
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.
Developed nearly 500 years ago, it is a variant of the Julian calendar. Today it is the most widely used calendar.
The primary forest tree of the Russian steppes. Its unique characteristic is the whitish-brownish, heavily cracked bark.
What secrets does the Moon have? Who were the first men on the Moon? You’ll find out everything from this video.
Curious little animal living in underground burrows in the African savannahs.
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.
Predators on top of the food chain prey on other animals. Their relationship is hunter and hunted.
The tallest animal on the planet, yet it has the same number of vertebrae as humans.
In this experiment we provide proof of the well-known theorem of Pythagoras with a scale.
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.
Find out whether the marble reaches the finish line faster on the straight or on the curved slope.
Rocks are a composed of minerals. These minerals can often be found in their pure forms.
Lake Balaton is a tectonic lake located in Hungary. It is the largest lake in Central Europe.
Photos taken by professional cameras at a slow shutter speed can reveal details invisible to the naked eye.
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.
This tree is a truly living fossil: it has gone through only minor changes since the Mesozoic Era.
This forest tree is a common tree species in hilly and mountainous regions. It prefers steep and shady slopes and tolerates colder climates.
This architectural style is characterised by stubby, thick walls and round-arched windows. Numerous monasteries and churches were built in this style in the...