Fat molecule

Three saturated fatty acid molecules linked to a glycerol molecule.

Desktop computer

This animation demonstrates the structure and most important peripherals of desktop computers.

Hunebeds

These special dolmens located in present-day Netherlands were built about 5,000 years ago.

Southern wood ant

An ant colony consist of a queen, male ants and workers.

Optical instruments

A wide variety of optical instruments are in use today, ranging from microscopes to telescopes.

Papermaking

Paper was invented more than two thousand years ago.

Volume of a tetrahedron

To calculate the volume of a tetrahedron we start by calculating the volume of a prism.

Oil tanker

Oil tankers appeared in the late 19th century; today they are among the largest ships.

Dice

Regular dice can be used for solving statistical and probability exercises.

Telescopes

This animation shows optical and radiotelescopes used in astronomical observation

Reed and bulrush

Cosmopolitan monocots inhabiting watersides.

Two-stroke engine

A two-stroke engine is a type of internal combustion engine with a cycle of only two (power) strokes.

Topography of the Earth

The animation presents the largest mountains, plains, rivers, lakes and deserts of the Earth.

Monsters of the Palaeozoic: sea scorpions

Eurypterids are an extinct group of Palaeozoic aquatic arthropods.

Apple tree

The apple is one of the most popular fruits around the world.

Edible nightshades

Many of the most important food crops we consume belong to the family of nightshades.

Hot air balloon

A hot air balloon is a balloon aircraft which is lifted by hot air.

Water turbine, generator

Water turbines convert the kinetic energy of water into electric current.

Secondary structure of proteins

Polypeptide chains are composed of amino acids and can appear in alpha-helix or beta-sheet form.

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