Groups of western jackdaws are frequently found in cities. Konrad Lorenz analysed the complex social behaviour of these animals.
Change of light conditions in different seasons. Calculating height using shadows.
The saker falcon is a large bird of prey widespread in Europe and and Asia.
The mummified body of a man who probably lived in the Chalcolithic period, was found in one of the glaciers of the Alps.
An orthopaedic disease of the foot, in which the longitudinal arch of the foot, formed by the tarsal bones, collapses.
Plants are capable of converting inorganic substances (carbon dioxide and water) into organic sugar.
The poisonous bite of the Chilean recluse spider poses a serious threat to human health.
By varying the position of the light source, you can examine the shades projected onto the planes of the coordinate system.
The theorem formulated by Leonhard Euler describes one of the basic properties of convex polyhedra.
Slavic warriors were greatly respected throughout Europe in the Middle Ages.
The Rietveld Schröder House, located in the town of Utrecht in the Netherlands, can be considered a forerunner of modern houses.
The Roman army, led by Flavius Aetius, stopped the Hun invasion led by king Attila
The Orthodox church, situated on a picturesque cliff, was named after John the Apostle
This animation presents the current refugee crisis from various points of view.
It is an alcaloide found in coffee, tea and kola nuts.
This scene presents a folk costume characteristic of Bulgaria's northern ethnographic region.
The Mir Castle Complex, situated in the town of Mir, Belarus was built in the Gothic-Renaissance style.
Learn the concept of colours, numbers, letters and shapes while playing.