Capacitors store electrical energy in the form of electric charge.
One of the most common types of flatworms.
A string quartet consists of four string players, it appeared in the late 18th century.
The animation demonstrates the most important types of feathers and their fine structure.
The statue was donated by the French to the USA for the centenary of gaining independence.
The piano is one of the most popular instruments in the world. It is a chordophone which produces sounds mechanically.
The church consecrated to Saint Basil was commissioned by Ivan the Terrible.
Polynesians travelled huge distances with their specially designed boats.
One of the most important components of the microwave oven is the magnetron, which produces the microwaves.
Geckos can walk on walls or even ceilings. The 3D scene explains this ability.
The dentition of different species of mammals reflect their feeding habits.
The marathon running event was instituted in commemoration of the run of a Greek soldier after the Battle of Marathon, fought between the Athenian and the...
This animation shows the hierarchical structure of the Medieval Christian church.
This animation demonstrates how a refrigerator works.
The ruler of the vast Mongol Empire was the Khan.
A type of herbivorous dinosaur easily recognisable by its large frill and three horns which lived in the Cretaceous period.
The Aztec Empire was a despotic, militaristic state ruled by the tlatoani.
In ecology, a niche is a term describing the way of life of a species.
The Byzantine Emperor was the head of the Byzantine Empire, the direct continuation of the Roman Empire.
The most important weapons of medieval Arab warriors were the bow and the sword.