Non-orientable surfaces

The Möbius strip and the Klein bottle are special two-dimensional surfaces with only one side.

Pteranodon longiceps

A prehistoric flying reptile, similar to birds. However, there is no direct evolutionary link between the two.

Glaciation

The last Ice Age ended about 13 thousand years ago.

Emperor penguin

Penguins are birds living in the Antarctic and adapted to cold temperature and swimming.

Water supply system

The water supply system provides clean and safe drinking water for the consumers.

Cube (exercises)

Edges, diagonals and faces of a cube can be identified by its vertices.

How does it work? - Digital camera

This animation demonstrates the structure and operation of digital cameras.

Rosetta Stone

The Rosetta Stone helped to solve the mystery of hieroglyphics.

Aeolian landforms on coasts and steppes

Wind, as an external force, plays an important role in shaping coastal areas and steppes.

Milky Way

The diameter of our galaxy is about 100,000 light years; it contains more than 100 billion stars, one of which is our Sun.

Blue whale

Marine mammals, the largest known animals to have ever existed.

The history of human migration

The migration of large human populations began in Ancient times.

Platonic solids

This animation demonstrates the five regular three-dimensional (or Platonic) solids, the best known of which is the cube.

Geyser

A geyser is a spring characterised by intermittent discharge of water and steam.

Paramecium caudatum

Common ciliated eucaryotic unicellular organisms widespread in freshwaters.

European pond turtle

The animation shows the anatomy of turtles.

Grass snake

A type of snake with a characteristic spot on its neck.

Daedalus and Icarus

An ancient Greek myth about the tragedy of father and son who wanted to flee the island of Crete.

Oasis

Oases are areas in deserts where water is available.

Mid-latitude cyclone and anticyclone

Cyclones are large areas of circulating air with clouds and precipitation being formed in its centre.

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