Three saturated fatty acid molecules linked to a glycerol molecule.
This animation demonstrates the structure and most important peripherals of desktop computers.
These special dolmens located in present-day Netherlands were built about 5,000 years ago.
An ant colony consist of a queen, male ants and workers.
A wide variety of optical instruments are in use today, ranging from microscopes to telescopes.
Paper was invented more than two thousand years ago.
To calculate the volume of a tetrahedron we start by calculating the volume of a prism.
This animation demonstrates how solar energy can be utilised.
Oil tankers appeared in the late 19th century; today they are among the largest ships.
Regular dice can be used for solving statistical and probability exercises.
This animation shows optical and radiotelescopes used in astronomical observation
Cosmopolitan monocots inhabiting watersides.
A two-stroke engine is a type of internal combustion engine with a cycle of only two (power) strokes.
The animation presents the largest mountains, plains, rivers, lakes and deserts of the Earth.
Eurypterids are an extinct group of Palaeozoic aquatic arthropods.
The apple is one of the most popular fruits around the world.
Many of the most important food crops we consume belong to the family of nightshades.
A hot air balloon is a balloon aircraft which is lifted by hot air.
Water turbines convert the kinetic energy of water into electric current.
Polypeptide chains are composed of amino acids and can appear in alpha-helix or beta-sheet form.