The American inventor presented his invention revolutionising telecommunication at New York University in 1837.
The device that transmits human voice as electrical signals was invented by Bell in 1876.
Yuri Gagarin became the first human in space on 12 April 1961.
Machines converting the energy of flowing or falling water into useful forms of power were already in use in the Middle Ages.
Candles have been used for lighting since ancient times.
The average house in Ancient Greece had a rectangular, geometrical floor plan and two storeys.
The Wright Flyer was the first successful powered, heavier-than-air aircraft, designed and built by the Wright brothers.
The life cycle of vertebrates starts with the production of the reproductive cells of an individual and ends with the production of the reproductive cells...
These organs are vital for the survival and development of plants.
The fortress-like palace was built by Roman Emperor Diocletian on the coast near his home town.
This animation explains the most important characteristics of waves through sound waves.
The building commissioned by Pompey the Great was the first permanent theatre in Ancient Rome.
RMS Titanic was the largest passenger ship at the beginning of the 20th century.
Icebergs are blocks of frozen freshwater floating in the sea.
Carrier of genetic information in cells.
Located in the Grand Mosque of Makkah, the Kaaba shrine is the most sacred site of Islam.
Massive accelerating or orbiting bodies cause ripples in spacetime. These are called gravitational waves.
The bacterial disease known as the bubonic plague is one of the deadliest infectious diseases in the history of mankind.
Mercenaries of the ancient Roman army were well-trained and well equipped with the most up-to-date weapons.
Soviet labour camps (Gulags) were located far from inhabited areas.