Automobiles have evolved a lot since the late 19th century.
A Zeppelin is a type of controllable, rigid airship.
Viruses consist of protein and DNA or RNA; they reprogram infected cells to produce more viruses.
The animation demonstrates the process of ring closure of open-chain glucose into alpha- and beta-D-glucose.
African tribes have their own distinct cultures.
Egyptian Pharaohs were respected as gods, they were lords of life and death.
The Ironsides were members of the Parliamentarian cavalry formed by Oliver Cromwell during the English Civil War.
This animation demonstrates the angle of inclination of lines and planes in various positions.
Soldiers of the Wehrmacht in World War II were well-trained and well-equipped with modern weapons.
The battle, that is considered to be a tactical masterpiece, meant a decisive victory for Alexander the Great against Persia.
The theorem formulated by Leonhard Euler describes one of the basic properties of convex polyhedra.
This animation demonstrates the states and largest cities of the USA.
A zither is one of the typical instruments of Hungarian folk music, played by strumming or plucking the strings.
The Altar of Peace, commissioned during the reign of Augustus, was one of the most important works of ancient Roman art.
Ancient Greek heavy infantryman.
Rotating a rectangle around its axes of symmetry or around its sides results in solids of revolution.
The Arch of Triumph was built at the entrance of the Forum Romanum, to commemorate Emperor Titus’ victory in the Siege of Jerusalem.
A colourless, odourless gas, an important component of the atmosphere, indispensable to sustain terrestrial life.
Colourless, odourless gas, highly toxic to humans and animals in high concentration.
Drums are played by hitting the membrane. There are many versions of drums.