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.
Soldiers of the ancient Macedonian Kingdom were dreaded warriors.
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.
A colorless, odorless, non-reactive gas, it constitutes 78.1% of Earth´s atmosphere.
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.
American soldiers fought in almost all major theaters of World War II.
Color a map with the fewest number of colors possible, so that no two adjacent regions have the same color.
This animation demonstrates birds' bones and eggs through the example of the common blackbird.
An acyl-carrier coenzyme taking part in both anabolic and catabolic processes.
The California Gold Rush started in 1848, near San Francisco.
A compound ion produced from carbonic acid by releasing protons.
Egyptian Pharaohs were respected as gods, they were lords of life and death.
The castle of Eger got its final shape and became an important component in the new chain of border forts in the 16th century.
Remnants of Ottoman architecture in Hungary include the Gazi Kasim Pasha Mosque in Pécs and the Minaret of Eger.
Coloring the vertices, edges and faces of a given cube according to the criteria specified in the exercise.