Structure of proteins

The structure and arrangement of polypeptide chains affects the spatial structure of proteins.

Egyptian Pyramids (Giza, 26th century BC)

The Giza Necropolis is the only one of the Ancient wonders still intact.

Concorde (1969)

The first supersonic passenger airliner entered service in 1976.

The flowers of angiosperms

The animation demonstrates the different flower types of angiosperms.

The bones of the thorax

The ribs, the sternum and the spinal column form the skeleton of the chest.

Bacteria (spheres, rods, spirals)

Bacteria occur in a wide range of shapes, including spheres, rods and spirals.

Layers of the ocean

Physical properties, as well as the flora and fauna of the ocean change with depth.

Viking settlement (10th century)

Typical settlements of the Norsemen were not only established in Scandinavia, they appeared on distant areas as well.

Construction of cars

This animations demonstrates the exterior and interior construction of cars, as well as their operation.

Saint Alexander Nevsky Cathedral (Sofia, 20th century)

Built in Neo-Byzantine style, this Orthodox cathedral is one of the symbols of the Bulgarian capital city.

How does it work? - Computer networks

The Internet allows us to send data quickly to large distances.

Electric motors

Electric motors are present in many areas of our everyday lives. Let's learn about the different types.

BR Standard Class 3 2-6-2T steam locomotive

A type of steam locomotives used by British Railways were manufactured in the 1950s.

Planets, sizes

The inner planets of the Solar System are terrestrial planets while the outer planets are gas giants.

Respiratory system

The respiratory system is responsible for the intake of oxygen and the release of carbon dioxide.

Offshore natural gas extraction, Norway

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's laboratory

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.

Dynamo (intermediate)

A dynamo converts mechanical energy into direct current.

Tenochtitlan (15th century)

The magnificent capital of the Aztec Empire astonished even the Spanish Conquistadors.

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