Saturn is the second largest planet in the Solar System, easily recognisable by its rings.
Articulated lorries play an important role in road transport.
Several analogous types of eyes have developed independently through convergent evolution.
Knallgas is the mixture of hydrogen and oxygen. It will explode when ignited.
A white, water-soluble, sweet compound known as sugar.
Archimedes was one of the most brilliant Greek scholars of ancient times, who made his mark with military inventions as well.
The medieval bell tower of the Cathedral of Pisa is the most famous leaning tower of the world.
The city with advanced culture was the first settlement in history to have a citadel.
Common salt is dissolved by water: polar water molecules form a coat around the ions.
During freezing hydrogen bonds are formed between water molecules resulting in a crystal structure.
Ancient Roman conquerors had effective siege engines developed for attacking fortifications.
Polymerised ethylene is known as polyethylene, a type of plastic.
A type of sugar found in mammalian milk.
The cathedral named after the Assumption of Mary into Heaven is one of the gems of French Gothic architecture.
The most important Neoclassicist building in France, completed in 1791, became the final resting place of many of France´s greats.
The building material of the cell walls and fibres of plants.
The first indoor theatre in modern history to be constructed according to the theatre-building codes of Antiquity was inaugurated in 1585.
Robert Fulton American engineer created the first operational steam-powered ship.
As the Roman Empire expanded, military camps were established on the newly conquered territories.
An entertaining animation to practise orientation using a map.