A compound ion produced from carbonic acid by releasing protons.
The best-known piece of the Hungarian Crown Jewels is the Holy Crown.
This animation demonstrates the most important equipment of ambulance cars.
The Global Positioning System consists of 24 satellites but only 4 have to be visible for positioning.
The first Hungarian-made locomotive powered directly from the national electricity network without complicated transformations.
The characteristic colours of the common kingfisher aid the bird in catching its prey.
The excellent archers were feared members of the Persian army
Marsh harriers are birds of prey found almost worldwide.
Direct action pumps and suction pumps are among the simplest water pumps.
In 1946 a Hungarian scientist was the first person to detect radar echoes from the Moon.
The most important types of local winds are the sea-land breeze, the mountain-valley breeze as well as the downslope winds.
One of the most beautiful Art Nouveau buildings in Hungary.
The emergency landing of the pilot appears in the frame story of Antoine de Saint-Exupéry´s most famous novel, The Little Prince.
Blood vessels in fishes' gills absorb oxygen and release carbon dioxide.
The geographical distribution of major (world) religions has been influenced by historical events.
Because of the military conflict in Sudan, millions of people had to flee their homes.
The phalanx formation was a military formation of the Greek heavy infantry.
Members of the ancient Roman Legions were the masters of military tactics.
A legendary fighter plane used by the German air force in World War II.
Slavic warriors were greatly respected throughout Europe in the Middle Ages.