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One of the most common types of flatworms.
Formic acid is the simplest carboxylic acid.
Oxygen carrier protein in our red blood cells.
Neurons are cells specialised for transmitting electric signals.
The first calendars and time-measuring instruments were already used by ancient Eastern civilisations.
The aircraft manufactured by the British de Haviland company was the world's first mass-produced commercial jetliner.
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...
One of the greatest archaeological finds of the 20th century was the tomb of the Egyptian pharaoh.
The animation offers a summary of the history of aviation from the Middle Ages.
The Greek fleet owed their success to their good tactics and their fast and easily manoeuvrable ships.
This animation demonstrates the mechanism and operation of record players.
Electric current can be generated by rotating an armature loop in a magnetic field.
An air conditioner cools the air inside by drawing heat away and releasing it outside.
Extinct proboscidea closely related to today's elephants, often hunted by prehistoric man.
The ancestors of Arachnida and Crustacea belonged to the class Trilobita.
Long-necked herbivorous dinosaur with a robust body.
Trolleybuses and trams are environment-friendly means of public transport
A group of fish characterised by a cartilaginous skeleton, well-known species include the great white shark and the great hammerhead shark.
This animation demonstrates how an escalator works.
The name of the Russian armoured cruiser became well known during the October Revolution of 1917.