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Semiconductors are materials that behave as insulators at low temperatures and act as conductors at high temperatures.
This 3D scene shows how railway points work.
Hippocrates, head of the medical school on the Greek island of Kos, is considered the 'Father of Medicine'.
The Aswan Dam was built for water storage and to prevent devastating floods.
The Maltese wall lizard (Podarcis filfolensis) is a lizard species native to the Maltese Islands.
This early medieval burial site is one of the archaeological treasures of Anglo-Saxon culture.
The Gothic cathedral is one of the best-known buildings in the French capital.
This scene presents the main administrative divisions of Mongolia.
Calculating the internal energy of ideal gases.
Magnificent pieces of art can be found among Ancient Egyptian sculptures.
Magnificent pieces of art can be found among Ancient Roman sculptures.
Magnificent pieces of art can be found among Ancient Greek sculptures.
A common hare species found in most temperate regions of the world.
This 3D scene presents the musical instrument called morin khuur.
Typical plant and animal cells exhibit a number of similarities and differences.
The polar bear is a large land carnivore that inhabits the Arctic.
The most common species of sea urchin in the Mediterranean Sea and eastern Atlantic Ocean.
The most important monastery in Serbia, considered the birthplace of the independent Serbian Orthodox Church and the state.
A large, spectacular aquatic plant that is an important symbol in various Asian cultures.
Until the early 21st century, space travel served scientific purposes exclusively. Then space tourism appeared.
Hop on this unique medieval vehicle that was used in the Mongol Empire.