Major phases in the history of theories and views about the structure of the atom.
The Benz Patent-Motorwagen is widely regarded as the first vehicle propelled by an internal combustion engine.
This animation explains transparency and opacity, the principle of radiography, and the light-absorbing properties of materials.
This animation demonstrates how a turbojet engine works.
This animation presents the main types of leaves and the differences between monocot and dicot leaves.
Bones of the upper limbs form the pectoral girdle and the arms.
According to Homer’s epic, Odysseus’ Stratagem caused the loss of Troy.
This animation demonstrates the structure and operation of CT scanners.
The 900 years old Benedictine abbey is situated in Melk, on the right bank of the Danube.
This animation explains active and passive transport processes occurring through cell membranes
Amino acids are the monomers of proteins.
The Doric, Ionic and Corinthian order of columns are different in size and ornamentation as well.
The French Montgolfier brothers were the first pioneers of flying.
This animation introduces the studies of astronomers and physicists whose works fundamentally changed our view of the universe.
Built in Neo-Byzantine style, this Orthodox cathedral is one of the symbols of the Bulgarian capital city.
Physical properties, as well as the flora and fauna of the ocean change with depth.
Darwin's legendary voyage aboard HMS Beagle played a crucial role in the development of the Theory of Evolution.
The train operates between Paris and southern Germany, its cruise speed is 320 km/h.
The magnificent bath complex of the Roman Emperor was built in the 3rd century AD.
The English engineer George Stephenson’s locomotive was built for a competition of locomotives in 1829.