Pula Arena (Pula, 1st century)

The Pula Arena, located in present-day Croatia, was one of the largest Roman amphitheatres in the Antiquity.

Surface tension

Surface tension is the property of a liquid that allows it to obtain the smallest surface area possible.

Stearic acid (octadecanoic acid) (C₁₇H₃₅COOH)

Solid, white substance, a constituent of vegetable oils and animal fats.

Hussite wagon fort

The Hussites mastered the use of war wagons in the 15th century.

Hunebeds

These special dolmens located in present-day Netherlands were built about 5,000 years ago.

Edible nightshades

Many of the most important food crops we consume belong to the family of nightshades.

Apple tree

The apple is one of the most popular fruits around the world.

Slavs

Modern Slavs live in 14 European countries that can be classified into 3 groups.

Papermaking

Paper was invented more than two thousand years ago.

Monsters of the Palaeozoic: sea scorpions

Eurypterids are an extinct group of Palaeozoic aquatic arthropods.

Cellulose (C₆H₁₀O₅)n

The building material of the cell walls and fibres of plants.

Oil tanker

Oil tankers appeared in the late 19th century; today they are among the largest ships.

Reed and bulrush

Cosmopolitan monocots inhabiting watersides.

Dodo

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.

Battleship (HMS Dreadnought, 1906)

HMS Dreadnought revolutionised battleship-building in the 20th century.

Archaeological excavation (pit house)

Large construction sites provide archaeologists searching for artefacts with a great deal of work.

The Cave of Altamira

The world-famous limestone cave with its amazing cave paintings is one of the most important archaeological sites of Palaeolithic art.

Mycenae (2nd millenium BC)

The city with advanced culture was the first settlement in history to have a citadel.

Archimedes’s military inventions (3rd century BC)

Archimedes was one of the most brilliant Greek scholars of ancient times, who made his mark with military inventions as well.

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