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Computer hard disk drives are devices of magnetic data storage.
A species of venomous snakes widespread in Europe. Its bite is rarely fatal to humans.
Gladiators were combatants who entertained audiences in fights against each other or wild animals in ancient Roman arenas.
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.
This animation demonstrates the geographical locations of the Earth's major cities.
The colonising powers´ colours were wiped off the map by the nations fighting to regain their independence.
An Ames room is a distorted room that is used to create an optical illusion.
The relationship between the pressure, volume and temperature of ideal gases is described by the gas laws.
Enzymes are protein molecules catalysing biochemical reactions. Their activity can be regulated.
A ray of light is reflected or refracted at the boundary of two mediums with different refractive indices.
Assemble fragments of broken three-dimensional shapes by rotating the models.
The animation demonstrates the most important types of feathers and their fine structure.
Inventions in the 18th century resulted in huge advances in the development of the textile industry.
The statue was donated by the French to the USA for the centenary of gaining independence.
Larvae of this type of mayflies spend the first three years of their lives in water, their adult lives last for only one day which they use for mating.
This animation compares a modern living room and a typical bourgeois salon.
Geckos can walk on walls or even ceilings. The 3D scene explains this ability.
In ecology, a niche is a term describing the way of life of a species.