Archaeopteryx

The archaeopteryx shows characteristics of both birds and reptiles. It is probably the...

Biogas power plant

Biogas can be produced from organic material (manure, plant waste, organic waste) using...

Transformer

A transformer is a device used for converting the voltage of electric current.

Capacitors

Capacitors store electrical energy in the form of electric charge.

Saint Basil's Cathedral (Moscow, 16th century)

The church consecrated to Saint Basil was commissioned by Ivan the Terrible.

Southern plantation with slaves (USA, 19th century)

Before the American Civil war the use of slaves on plantations was typical in the...

Tardigrade

Tardigrades can survive in extreme environments, they can even stay alive in outer space.

Traditional Arab sailboat (Sambuk)

The largest type of Arab sailboat, most commonly used as trading vessels in the Persian Gulf.

How does it work? – Tower crane

Tower cranes are machines used for lifting loads weighing up to several tonnes.

Platypus

A mammal with features typical of reptiles: it lays eggs and has a cloaca.

Ammonites

An extinct group of Cephalopoda, with solid external skeletons. They are excellent index...

Underground coal mining

As opposed to opencast mines, in underground mines the layers covering coal are not...

How does it work? – Cinema projector

This animation demonstrates the design and operation of a traditional cinema projector.

Freshwater fishes

Many freshwater fishes are also popular as food.

3D Tangram

A special, 3D version of the well-known Chinese logical game.

How do geckos' feet adhere to smooth surfaces?

Geckos can walk on walls or even ceilings. The 3D scene explains this ability.

Long-tailed mayfly

Larvae of this type of mayflies spend the first three years of their lives in water,...

European pond turtle

The animation shows the anatomy of turtles.

Heart attack

The cause of a heart attack is the blockage of a coronary artery. It is one the most...

Types of feathers

The animation demonstrates the most important types of feathers and their fine structure.

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