Jacob Perkins

Jacob Perkins (9 July 1766 – 30 July 1849) was an American inventor, mechanical engineer and physicist. Continue reading

Ancient Greek Philosopher Proposed a Heliocentric Universe

Aristarchus of Samos, a Greek philosopher and mathematician proposed a heliocentric universe theory in 300 BCE, that the earth and planets make circular orbits around the sun. Continue reading

Palace of Westminster Had The First Patented Cooling System

Palace of Westminster, Houses of Parliament in London, England was the first building with a patented cooling system installed in 1834. Continue reading

Callimachus of Cyrene

Callimachus (/kæˈlɪməkəs/; Greek: Καλλίμαχος, Kallimakhos; 310/305–240 BC) was a native of the Greek colony of Cyrene, Libya. He was a poet, critic and scholar at the Library of Alexandria and enjoyed the patronage of the Egyptian–Greek Pharaohs Ptolemy II Philadelphus and Ptolemy III Euergetes. Continue reading

Sumerians Develop Astrological System

Sumerians and other Mesopotamians developed the astrological system as early as 2500 BCE. Continue reading

Classification System Constructed for Alexandrian Library

A knowledge classification system was constructed at the royal library in Alexandria, Egypt by the Greek poet, Callimachus of Cyrene in third century BCE. Continue reading

Probation system for criminals

This was the first such system in the world. Boston, MA, USA, in 1878, legally established a probation system for criminals as a judicial policy. Continue reading

Italy Began to Electrify Main Line Tracks

In 1902, Italy began the process of electrification. Continue reading

Leonardo da Vinci

Leonardo di ser Piero da Vinci (Italian: [leoˈnardo di ˌsɛr ˈpjɛːro da (v)ˈvintʃi] ( listen); 15 April 1452 – 2 May 1519), more commonly Leonardo da Vinci or simply Leonardo, was an Italian polymath whose areas of interest included invention, painting, sculpting, architecture, science, music, mathematics, engineering, literature, anatomy, geology, astronomy, botany, writing, history, and cartography. Continue reading

Pigeon postal system

Pigeons were regularly used for official and military communications, Continue reading