The Pula Arena, located in present-day Croatia, was one of the largest Roman amphitheatres in the Antiquity.
Surface tension is the property of a liquid that allows it to obtain the smallest surface area possible.
Solid, white substance, a constituent of vegetable oils and animal fats.
The Hussites mastered the use of war wagons in the 15th century.
These special dolmens located in present-day Netherlands were built about 5,000 years ago.
Many of the most important food crops we consume belong to the family of nightshades.
The apple is one of the most popular fruits around the world.
Modern Slavs live in 14 European countries that can be classified into 3 groups.
Paper was invented more than two thousand years ago.
Eurypterids are an extinct group of Palaeozoic aquatic arthropods.
The building material of the cell walls and fibres of plants.
Oil tankers appeared in the late 19th century; today they are among the largest ships.
Cosmopolitan monocots inhabiting watersides.
A white, water-soluble, sweet compound known as sugar.
The dodo is an extinct species of birds that used to be native to the island of Mauritius. It has become the symbol of extinction.
HMS Dreadnought revolutionised battleship-building in the 20th century.
Large construction sites provide archaeologists searching for artefacts with a great deal of work.
The world-famous limestone cave with its amazing cave paintings is one of the most important archaeological sites of Palaeolithic art.
The city with advanced culture was the first settlement in history to have a citadel.
Archimedes was one of the most brilliant Greek scholars of ancient times, who made his mark with military inventions as well.