The phosphorus cycle

The phosphorus cycle describes the movement of phosphorus through the lithosphere, hydrosphere, and biosphere.

Common carp

Freshwater fish used as food in many parts of the world.

Viking chieftain (10th century)

Viking leaders were elected from tribe members by the right of blood or an act of bravery.

Edible frog

This animation demonstrates the anatomy of amphibians through the example of a common species of frogs.

European mole

Moles are small subterranean mammals with modified, spade-like forelegs.

Freshwater pearl mussel

A species of mollusc widespread in freshwaters.

Common earthworm

The anatomy of annelids is demonstrated through the example of the common earthworm.

Maize

One of the most important monocot crops.

Jellyfish

Jellyfish are free-swimming marine animals, a species of Cnidaria, the most ancient group of Eumetazoans.

Sponge

The most ancient group of animals, they live underwater, lack real tissues and body symmetry.

Amoeba proteus

Widespread heterotrophic unicellular organisms with constantly changing shapes

Oil molecule

Triglycerides containing unsaturated fatty acids are liquid at room temperature.

Fat molecule

Three saturated fatty acid molecules linked to a glycerol molecule.

Paramecium caudatum

Common ciliated eucaryotic unicellular organisms widespread in freshwaters.

Mallard

This animation demonstrates the anatomy of birds through the example of mallards.

String quartet

A string quartet consists of four string players, it appeared in the late 18th century.

Patellar reflex

The reflex triggered by the stretching of the thigh extensor muscle is the patellar reflex.

Observatory

Observatories are often built at high elevations to minimise the effects of atmospheric turbulence

Piano

The piano is one of the most popular instruments in the world. It is a chordophone which produces sounds mechanically.

Battle of Issus (333 BC)

The battle ended with the overwhelming victory of the Macedonian army over the Persian army led by Darius III.

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