The changing bicycle, at first mocked as a toy, is a true mirror of the technical development over the last three centuries.
The Northern white-breasted hedgehog rolls into a ball to protect itself.
The Japanese Mitsubishi A6M, commonly known as 'Zero' to the Allies, was a legendary aircraft of the Second World War.
Archimedes was one of the most brilliant Greek scholars of ancient times, who made his mark with military inventions as well.
Highly committed Japanese soldiers fought primarily at the Asian and Pacific theatres of the Second World War.
The animation presents the main air, water and land routes and transport hubs.
As the Roman Empire expanded, military camps were established on the newly conquered territories.
Ancient Roman conquerors had effective siege engines developed for attacking fortifications.
The Earth is divided into geographical and climatic zones, which result in the zonation of vegetation.
The city with advanced culture was the first settlement in history to have a citadel.
Fatty acid molecules consist of a polar head and a non-polar tail, therefore they are suitable for removing fat stains.
Limestone is a widely and diversely used material.
The concentration camp established on Polish territory was the administrative centre of a huge camp complex.
Producing speech requires the synchronised operation of several cortical centres.
Stirling engines are also known as external combustion engines. Unlike internal combustion engines (e.g. Otto-engine), here combustion takes place outside...
As opposed to underground mines, in open-pit mines the layers covering coal are removed, coal is extracted on the surface.
Tidal power stations utilise the daily fluctuation of the water level for producing electricity.
The Earth is divided into 24 time zones. Standard time is the time used within time zones.
The colonising powers´ colours were wiped off the map by the nations fighting to regain their independence.
The Chengdu J-20, also known as Mighty Dragon, is a multiple function stealth fighter aircraft.