A sailing vessel with characteristic lugsails used for both military and trade purposes.
Biogas can be produced from organic material (manure, plant waste, organic waste) using bacteria. Biogas is a mixture of methane and carbon dioxide; burning...
In summer, monsoon winds bring heavy rainfall from the ocean to the continent.
The oxygen cycle describes the movement of oxygen within its three main reservoirs.
The European badger is an omnivorous, nocturnal animal. Badger colonies live in large burrow systems, called setts.
The bell is a percussion instrument and an idiophone. Many types of bells exist.
A transformer is a device used for converting the voltage of electric current.
The ruler of the vast Mongol Empire was the Khan.
With the example of the stag beetle we demonstrate how insects' muscles function, how insects fly and how they reproduce.
Mirror image isomers of asymmetrical shapes and solids are non-superimposable.
While the density of spider silk is less than that of nylon filaments, its tensile strength is greater than that of steel.
The river and marine sailing boats of ancient Egypt were one-masted, oared boats
The torii is a traditional Japanese gate built at the entrance of shrines.
Stirling engines are also known as external combustion engines. Unlike internal combustion engines (e.g. Otto-engine), here combustion takes place outside...
The characteristic ancient Greek statue was found on the bottom of the Adriatic Sea.
One of the Croatian sculptor's most famous works depicts a woman wearing a traditional costume.
A game to practise the use of analogue and digital clocks.
A special, 3D version of the well-known Chinese logical game.
The three main types of blood vessels in the human body are the arteries, the veins, and the capillaries.
In a passive house a comfortable inner temperature can be ensured without the use of traditional heating and cooling systems.