Балистична ракета V-2 (1944г.)

Германската ракета с течно гориво, разработена през II-рата Световна война, е първият...

Farming techniques

Farming techniques evolved with the development of human civilisation in the Middle Ages...

Megalithic cultures in Europe

Structures consisting of enormous stone blocks, dating back thousands of years, are...

Hexagonal metallic lattice

Metals forming hexagonal metallic lattices are rigid and difficult to machine.

Platonic solids

This animation demonstrates the five regular three-dimensional (or Platonic) solids, the...

How does it work? - Differential gear

A differential allows the driven wheels of a car to rotate at different speeds when the...

AH-64 Apache (USA, 1975)

The Apache attack helicopter, named after an American Indian tribe, was developed for the...

Polynesian family settlement (Samoa, 15th century)

The architecture of traditional Samoan family settlements reflect the unique culture of...

Electricity supply network

The purpose of the electricity supply network is to provide electricity for consumers.

Stirling engine - hot-air engine

Stirling engines are also known as external combustion engines. Unlike internal...

Conic sections

The conic section is a plane curve that is created when a right circular cone is...

Supermarine Spitfire (United Kingdom, 1938)

Spitfire was a legendary British single-seat military aircraft used in World War II.

Ivan Meštrović: History of the Croats

One of the Croatian sculptor's most famous works depicts a woman wearing a traditional...

B-17 Flying Fortress (USA, 1938)

The ´Flying Fortress´ was developed for the United States Army Air Force by Boeing

Non-orientable surfaces

The Möbius strip and the Klein bottle are special two-dimensional surfaces with only one...

Hussite wagon fort

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

Church of St John at Kaneo (Ohrid, 13th c.)

The Orthodox church, situated on a picturesque cliff, was named after John the Apostle

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