A prehistoric amphibian and an early representative of the Tetrapods, which became extinct 360 million years ago.
This animation demonstrates the structure of water towers.
The protective embankment, or, in case of minor floods, the summer dyke ensures the protection against flood damage.
Giant sequoias are the world's largest living organisms by mass.
One of the most important parts of a medieval castle was the Knights´ hall.
Medieval knights were vassals of feudal lords and fought on horseback in battles.
Large, extinct species of cats named after the shape of their large canine teeth.
One of the main units of Matthias Corvinus´ Black Army was the cavalry.
Television, invented in the early 20th century, became one of the basic forms of entertainment.
German sordiers in the First World War were well trained and used modern weapons.
During World War I, Britain was part of the military alliance called the ´Triple Entente´.
The surface of a sphere consists of the set of points which are all at the same distance from a given point in space.
Based on their life cycle, insects can be grouped into three categories: ametabolous, hemimetabolous or holometabolous insects.
Market towns became the most common type of towns in the Kingdom of Hungary by the Late Middle Ages.
Calculating the volume of a sphere is possible using an appropriate cylinder and cone.
An acyl-carrier coenzyme taking part in both anabolic and catabolic processes.
Wines of the Tokaj wine-growing region are well known worldwide.
Medieval kings were typically depicted sitting on their thrones, wearing a crown and the Royal regalia.
Caliphs, considered successors of the Prophet Muhammad, were the most important religious leaders of Islam.
Ancient Persian monarchs were famous for the size of their empire and their wealth.