Eurypterids are an extinct group of Palaeozoic aquatic arthropods.
The V-1 flying bomb was an early pulse-jet-powered cruise missile developed in Nazi Germany and deployed in WWII.
The adrenal glands are responsible for maintaining homeostasis and producing a rapid response in stressful situations.
This 3D scene explains the correlation between the ratio of similarity and the ratio of volume of geometric solids.
Cossacks, members of independent semi-military communities, played an important role in the history of Ukraine.
A presentation of the major administrative units of China.
Practise the German alphabet and form words from the letters.
Practise the English alphabet, build words from letters.
Practise the Russian alphabet, build words from letters.
There are two basic cell types: prokaryotic and eukaryotic cells.
This scene explains the structure and functions of the bones.
The American bison is the largest land animal in North America.
By positron emission tomography (PET), we can obtain visual information on our internal organs without making any surgical incisions.
The range of applications of unmanned aerial vehicles ('drones') keeps growing.
The vacuum cleaner creates a partial vacuum and sucks up dust with the help of the incoming high-pressure air.
This 3D scene presents the steps of the cement manufacturing process.
This 3D scene presents the flora and fauna of the last period of the Palaeozoic Era.
Frank Lloyd Wright's well-known work is a masterpiece of modern organic architecture.
This scene presents the location, anatomy and functioning of the central organ of the human circulatory system.
The development of mosses, ferns, gymnosperms and angiosperms is characterised by the alternation of generations.