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This animation demonstrates the main sources of air pollution: agriculture, industry and urban settlements.
Chlorophyll is a photosensitive green pigment found in plants; it absorbs light energy, thus plays a vital role in photosynthesis.
Honeybees produce a sweet and nutritious substance, honey.
The pericarp of real fruits develops from the carpel, while the pericarp of pseudofruits develops from other parts of flowers.
Polypeptide chains are composed of amino acids and can appear in alpha-helix or beta-sheet form.
Triglycerides containing unsaturated fatty acids are liquid at room temperature.
Three saturated fatty acid molecules linked to a glycerol molecule.
This animation demonstrates the structure and most important peripherals of desktop computers.
A wide variety of optical instruments are in use today, ranging from microscopes to telescopes.
The capacity of data storage devices have increased at an incredible rate during the past decades.
Observatories are often built at high elevations to minimise the effects of atmospheric turbulence
This animation demonstrates how solar energy can be utilised.
A two-stroke engine is a type of internal combustion engine with a cycle of only two (power) strokes.
This animation shows optical and radiotelescopes used in astronomical observation.
Viking leaders were elected from tribe members by the right of blood or an act of bravery.
The oxygen cycle describes the movement of oxygen within its three main reservoirs.
This animation demonstrates the structure of small, mass-produced circuit boards.
The phosphorus cycle describes the movement of phosphorus through the lithosphere, hydrosphere, and biosphere.
In summer, monsoon winds bring heavy rainfall from the ocean to the continent.
This animation demonstrates the main sources of soil pollution.
The main sources of water pollution are industry, agriculture and urban areas.
Water turbines convert the kinetic energy of water into electric current.
A hot-air balloon is a balloon aircraft which is lifted by hot air.