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  2. Before Present - Wikipedia

    en.wikipedia.org/wiki/Before_Present

    The BP scale is sometimes used for dates established by means other than radiocarbon dating, such as stratigraphy. [5] [6] This usage differs from the recommendation by van der Plicht & Hogg, [7] followed by the Quaternary Science Reviews, [8] [9] both of which requested that publications should use the unit "a" (for "annum", Latin for "year") and reserve the term "BP" for radiocarbon estimations.

  3. 5th millennium BC - Wikipedia

    en.wikipedia.org/wiki/5th_millennium_BC

    World map in 5000 BC. The 5th millennium BC spanned the years (5000 BC - 4001 BC) (c. 7 ka to c. 6 ka), that is, inclusive of 5000 BC but exclusive of 4000 BC. It is impossible to precisely date events that happened around the time of this millennium and all dates mentioned here are estimates mostly based on geological and anthropological analysis.

  4. 6th millennium BC - Wikipedia

    en.wikipedia.org/wiki/6th_millennium_BC

    The 6th millennium BC spanned the years 6000 BC to 5001 BC (c. 8 ka to c. 7 ka). It is impossible to precisely date events that happened around the time of this millennium and all dates mentioned here are estimates mostly based on geological and anthropological analysis.

  5. List of time periods - Wikipedia

    en.wikipedia.org/wiki/List_of_time_periods

    Aegean Civilization (Crete, Greece and Near East; c. 3000 BC – c. 1050 BC) [4] Iron Age Europe (c. 1050 BC – c. 500 AD) Early Iron Age (c. 1050 BC – 776 BC) – part of the Greek Dark Ages; Classical antiquity (776 BC – 476 AD) Archaic Greece (776 BC – 480 BC) – begins with the First Olympiad, traditionally dated 776 BC

  6. Geologic time scale - Wikipedia

    en.wikipedia.org/wiki/Geologic_time_scale

    The geologic time scale or geological time scale (GTS) is a representation of time based on the rock record of Earth. It is a system of chronological dating that uses chronostratigraphy (the process of relating strata to time) and geochronology (a scientific branch of geology that aims to determine the age of rocks).

  7. Geological history of Earth - Wikipedia

    en.wikipedia.org/wiki/Geological_history_of_Earth

    Geologic time shown in a diagram called a geological clock, showing the relative lengths of the eons of Earth's history and noting major events The geological history of the Earth follows the major geological events in Earth's past based on the geological time scale , a system of chronological measurement based on the study of the planet's rock ...

  8. List of decades, centuries, and millennia - Wikipedia

    en.wikipedia.org/wiki/List_of_decades,_centuries...

    11th millennium BC · 11,000–10,001 BC 10th millennium BC · 10,000–9001 BC 9th millennium BC · 9000–8001 BC 8th millennium BC · 8000–7001 BC 7th millennium BC · 7000–6001 BC 6th millennium BC · 6000–5001 BC 5th millennium BC · 5000–4001 BC 4th millennium BC · 4000–3001 BC 40th century BC: 39th century BC: 38th century BC ...

  9. Common Era - Wikipedia

    en.wikipedia.org/wiki/Common_Era

    As of October 2019, the BBC News style guide has entries for AD and BC, but not for CE or BCE. [57] The style guide for The Guardian says, under the entry for CE/BCE: "some people prefer CE (common era, current era, or Christian era) and BCE (before common era, etc.) to AD and BC, which, however, remain our style". [58]