The Doric, Ionic and Corinthian order of columns are different in size and ornamentation as well.
This animation explains active and passive transport processes occurring through cell membranes
Machines converting the energy of wind into useful forms of power were already in use in the Middle Ages.
Physical properties, as well as the flora and fauna of the ocean change with depth.
The train operates between Paris and southern Germany, its cruise speed is 320 km/h.
While generators convert mechanical energy into electrical energy, electric motors convert electrical energy into mechanical energy.
This animation demonstrates Sir Isaac Newton's three laws of motion that laid the foundation for classical mechanics.
The animation shows the traditional Japanese wooden townhouse, the machiya.
Energy released during nuclear fission can be used for civilian or military purposes.
The animation demonstrates the different flower types of angiosperms.
As a result of the revolutionary advances in the Neolithic, settling human communities established the first lasting settlements.
A mushroom is the fleshy fruiting body of a fungus, made up from hyphae.
Major phases in the history of theories and views about the structure of the atom.
Electric motors are present in many areas of our everyday lives. Let's learn about the different types.
Built in Neo-Byzantine style, this Orthodox cathedral is one of the symbols of the Bulgarian capital city.
Short-lived but extremely powerful tornadoes can cause a great deal of damage.
Rotating a geometric shape around a line within its geometric plane as an axis results in a solid of revolution.
This animation presents the main types of leaves and the differences between monocot and dicot leaves.
Before the emergence of motorised vehicles, letters and parcels were delivered by horse-drawn mail coaches.
This animation demonstrates how a turbojet engine works.