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Prehistory – Period between the appearance of Homo ("humans"; first stone tools c. three million years ago) and the invention of writing systems (for the Ancient Near East: c. five thousand years ago). Paleolithic – the earliest period of the Stone Age Lower Paleolithic – time of archaic human species, predates Homo sapiens
See calendar and list of calendars for other groupings of years. See history , history by period , and periodization for different organizations of historical events. For earlier time periods, see Timeline of the Big Bang , Geologic time scale , Timeline of evolution , and Logarithmic timeline .
Time interval, before the present time. a=annus (year) Approx. period (BCE) Event, invention or historical development 55–45 ka: 53,000–43,000 BCE: Skeleton of a Neanderthal in Iraq who lived 10 to 15 years after losing his forearm. [92] Remains of string in France. [151] [152] Arrowheads used by Homo sapiens at Grotte Mandrin .
These timelines of world history detail recorded events since the creation of writing roughly 5000 years ago to the present day. For events from c. 3200 BC – c. 500 see: Timeline of ancient history; For events from c. 500 – c. 1499, see: Timeline of post-classical history; For events from c. 1500, see: Timelines of modern history
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 ...
A rarer approach groups years from the beginning of the AD calendar era to produce successive decades from a year ending in a 1 to a year ending in a 0, with the years 1–10 described as "the 1st decade", years 11–20 "the 2nd decade", and so on; later decades are more usually described as 'the st, nd, rd, or th decade of the st, nd, rd, or ...
The Gregorian reform was never purported to bring the calendar in line with the Julian calendar as it had existed at the time of its institution in 45 BC, but as it had existed in 325 AD, the time of the Council of Nicaea, which had established a method for determining the date of Easter Sunday by fixing the vernal equinox on March 21 in the ...
An Encyclopedia of World History (5th ed. 1973); highly detailed outline of events online free; Morris, Richard B. and Graham W. Irwin, eds. Harper Encyclopedia of the Modern World: A Concise Reference History from 1760 to the Present (1970) online