HMS Dreadnought revolutionised battleship-building in the 20th century.
Farmhouses in the Middle Ages were simple, single-storey structures built from earth, mud and wood.
The American Civil War was fought between the Confederacy and the Union.
Articulated lorries play an important role in road transport.
Karst formations include dolines and dripstones.
One of the oxoacids of nitrogen. A colourless compound with a pungent odour, a strong oxidant.
The mosque, built in a distinctive architectural style, is the largest adobe structure in the world.
The American bison is the largest land animal in North America.
There are various types of instruments used for measuring temperature.
Rimac Automobili's first model is known as the world's fastest production electric vehicle.
Remarkable civil engineering works to continue the Netherland's centuries-long fight against the sea.
This animation helps you learn the basics of healthy eating.
Organs that detect signals of the environment or of the body and transmit them to the brain as nerve impulses.
Cossacks, members of independent semi-military communities, played an important role in the history of Ukraine.
The axolotl, also known as Mexican salamander, is an amphibian species that keeps its gills even in adulthood.
A crystalline allotrope of carbon which was discovered at the end of the 1980s.
Today called Dubrovnik, this Croatian city is known for its spectacular architecture and beautiful location.
A polynucleotid made up of phosphoric acid, ribose, and nucleobases (cytosine, uracil, adenine and guanine).
This animation presents the provinces and provincial capitals of the Netherlands.
A regular square pyramid is a right pyramid with a square base and four triangular faces.