The structure and arrangement of polypeptide chains affects the spatial structure of proteins.
The Giza Necropolis is the only one of the Ancient wonders still intact.
The first supersonic passenger airliner entered service in 1976.
The animation demonstrates the different flower types of angiosperms.
Eukaryotic cells contain a number of organelles.
The ribs, the sternum and the spinal column form the skeleton of the chest.
Bacteria occur in a wide range of shapes, including spheres, rods and spirals.
Physical properties, as well as the flora and fauna of the ocean change with depth.
Typical settlements of the Norsemen were not only established in Scandinavia, they appeared on distant areas as well.
This animations demonstrates the exterior and interior construction of cars, as well as their operation.
Built in Neo-Byzantine style, this Orthodox cathedral is one of the symbols of the Bulgarian capital city.
The Internet allows us to send data quickly to large distances.
Electric motors are present in many areas of our everyday lives. Let's learn about the different types.
A type of steam locomotives used by British Railways were manufactured in the 1950s.
The inner planets of the Solar System are terrestrial planets while the outer planets are gas giants.
The respiratory system is responsible for the intake of oxygen and the release of carbon dioxide.
The Troll A is an offshore natural gas platform, the largest offshore platform ever built: it rises about 170 metres above water level, weighs 656,000...
Marie Curie, the only person to win the Nobel Prize in two different sciences, is probably the most famous woman in the history of science.
A dynamo converts mechanical energy into direct current.
The magnificent capital of the Aztec Empire astonished even the Spanish Conquistadors.