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40th century BC: 39th century BC: 38th century BC: 37th century BC: 36th century BC: 35th century BC: 34th century BC: 33rd century BC: 32nd century BC: 31st century BC: 3rd millennium BC · 3000–2001 BC 30th century BC: 29th century BC: 28th century BC: 27th century BC: 26th century BC: 25th century BC: 24th century BC: 23rd century BC: 22nd ...
4th century BC: Greek philosophers study the properties of logical negation. 4th century BC: The first true formal system is constructed by Pāṇini in his Sanskrit grammar. [34] [35] 4th century BC: Eudoxus of Cnidus states the Archimedean property. [36] 4th century BC: Thaetetus shows that square roots are either integer or irrational.
4th century BC: Traction trebuchet in Ancient China. [247] 4th century BC: Gears in Ancient China; 4th century BC: Reed pens, utilising a split nib, were used to write with ink on Papyrus in Egypt. [247] 4th century BC: Nailed Horseshoe, with 4 bronze shoes found in an Etruscan tomb. [248] 375 BC – 350 BC: Animal-driven rotary mill in ...
Historical timelines show the significant historical events and developments for a specific topic, over the course of centuries or millennia. Graphical timelines provide a visual representation for the timespan of multiple events that have a particular duration, over the course of centuries or millennia.
240 BC - Archimedes devised a principle which he later used to solve the riddle of the suspect crown. 230 BC – Eratosthenes measures the Earth's circumference and diameter. 10th century
The historical application of biotechnology throughout time is provided below in chronological order.. These discoveries, inventions and modifications are evidence of the application of biotechnology since before the common era and describe notable events in the research, development and regulation of biotechnology.
The date used as the end of the ancient era is arbitrary. The transition period from Classical Antiquity to the Early Middle Ages is known as Late Antiquity.Late Antiquity is a periodization used by historians to describe the transitional centuries from Classical Antiquity to the Middle Ages, in both mainland Europe and the Mediterranean world: generally from the end of the Roman Empire's ...
c.400 BC – In China, the philosopher Mozi founds the Mohist school of philosophy and introduces the 'three-prong method' for testing the truth or falsehood of statements. [8] c.400 BC – The Greek philosopher Democritus advocates inductive reasoning through a process of examining the causes of perceptions and drawing conclusions about the ...