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One of the most important religious military orders, formed in the era of the Crusades.
Inhabitants of the northern part of the Netherlands have successfully fought the sea since the Middle Ages.
This animation demonstrates how an escalator works.
The earliest version of the lute appeared in ancient Mesopotamia.
The American Civil War was fought between the Confederacy and the Union.
Concave and convex lenses are used for the correction of short-sightedness and long-sightedness.
Producing speech requires the synchronised operation of several cortical centres.
Articulated lorries play an important role in road transport.
This animation demonstrates the structure and operation of digital cameras.
Penguins are birds living in the Antarctic and adapted to cold temperature and swimming.
This animation demonstrates the structure and operation of different types of optical disc drives.
The naval battle fought by the British Navy against the German Navy was the largest sea battle in World War I.
Solomon's temple became one of the most important symbols of Jewish architecture.
This animation demonstrates the anatomy of tulips, daffodils and snowdrops.
Smoking severely damages the respiratory system, it may cause COPD or lung cancer.
Computer hard disk drives are devices of magnetic data storage.
Gladiators were combatants who entertained audiences in fights against each other or wild animals in ancient Roman arenas.
A species of venomous snakes widespread in Europe. Its bite is rarely fatal to humans.
The battleship USS Missouri, first deployed during WWII was also deployed in the Gulf War.
Electric current can be generated by rotating an armature loop in a magnetic field.
Dicotyledons have two embryonic leaves (cotyledons), while monototyledons have only one.