Geographic coordinate system

The geographic coordinate system enables every location on the Earth to be exactly specified.

Atmospheric circulation

The difference between the temperature of the polar and equatorial zones causes...

The human eye

The eye is one of our most important sense organs. When stimulated by light, electric...

Roman snail

A widespread snail species, also popular as food.

Glands connected to the duodenum

The pancreas and the liver empty digestive juices into the duodenum.

Deep Sea Hydrothermal Vents

A hydrothermal vent is a fissure in the planet's surface through which geothermally...

Animal and plant cells, cellular organelles

Eukaryotic cells contain a number of organelles.

Chest

The ribcage, the sternum and the spinal column together form the chest, in which the...

Bacteria (spheres, rods, spirals)

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

European crayfish

A type of large freshwater crayfish widespread in Europe.

Euglena viridis

Unicellular eukaryotes living in freshwaters, capable of feeding autotrophically and...

European garden spider

This animation demonstrates the anatomy of spiders through the example of a common...

Body parts

This animation introduces body parts on a male anatomical model.

Ozone layer

The ozone layer filters the Sun´s harmful UV radiation, therefore it is indispensable for...

Lightning

Lightning is a sudden electrostatic discharge accompanied by a sound known as thunder.

Formation of stratovolcanoes

Stratovolcanoes consist of layers of volcanic ash, debris and lava.

Optical illusion

The information gathered by the eye is misinterpreted by the brain.

Geographical discoveries (15th-17th century)

Legendary geographical discoveries at the beginning of the Modern Age had not only...

Baths of Caracalla (Rome, 3rd century)

The magnificent bath complex of the Roman Emperor was built in the 3rd century A.D.

Hot-air balloon (18th century)

The French Montgolfier brothers were the first pioneers of flying.

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