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  2. Timeline of the evolutionary history of life - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_the...

    The earliest evidence for life on Earth includes: 3.8 billion-year-old biogenic hematite in a banded iron formation of the Nuvvuagittuq Greenstone Belt in Canada; [30] graphite in 3.7 billion-year-old metasedimentary rocks in western Greenland; [31] and microbial mat fossils in 3.48 billion-year-old sandstone in Western Australia.

  3. List of time periods - Wikipedia

    en.wikipedia.org/wiki/List_of_time_periods

    Early modern period – The chronological limits of this period are open to debate. It emerges from the Late Middle Ages (c. 1500), demarcated by historians as beginning with the fall of Constantinople in 1453, in forms such as the Italian Renaissance in the West, the Ming dynasty in the East, and the rise of the Aztecs in the New World.

  4. Stage-crisis view - Wikipedia

    en.wikipedia.org/wiki/Stage-Crisis_View

    In order to do so effectively, he must differentiate between the life course and the life cycle. The life course, as he sees it, is the chronological process of living; from the beginning of life until the end. The life cycle on the other hand, is the common sequence of stages that every person undergoes during their life course.

  5. Chalcolithic Europe - Wikipedia

    en.wikipedia.org/wiki/Chalcolithic_Europe

    The Chalcolithic (also Eneolithic, Copper Age) period of Prehistoric Europe lasted roughly from 5000 to 2000 BC, developing from the preceding Neolithic period and followed by the Bronze Age. It was a period of Megalithic culture, the appearance of the first significant economic stratification, and probably the earliest presence of Indo ...

  6. Archaic Period (Americas) - Wikipedia

    en.wikipedia.org/wiki/Archaic_Period_(Americas)

    The dates, and the characteristics of the period called "Archaic" vary between different parts of the Americas. Sometimes also referred to as the "Pre-Ceramic stage" or period, it followed the Lithic stage and was superseded by the Formative stage, or a Preformative stage. [1] The typical broad use of the terms is as follows:

  7. What Is the Oxford Comma, Exactly? Plus, Here's Why It's So ...

    www.aol.com/lifestyle/oxford-comma-exactly-plus...

    The difference between an Oxford comma and a regular comma is that an Oxford comma refers to the final comma in a series that would come before the last conjunction of a sentence.

  8. Periodization - Wikipedia

    en.wikipedia.org/wiki/Periodization

    The term Middle Ages also derives from Petrarch. He was comparing his own period to the Ancient or Classical world, seeing his time as a time of rebirth after a dark intermediate period, the Middle Ages. The idea that the Middle Ages was a middle phase between two other large scale periodizing concepts, Ancient and Modern, still persists.

  9. Dying To Be Free - The Huffington Post

    projects.huffingtonpost.com/dying-to-be-free...

    Roland participated in an outpatient program, went through detox many times, quit in the middle of two different long-term residential stints, and completed a stay at Recovery Works, in Georgetown, before her fatal overdose a week later, on April 16, 2013. For the treatment centers, the revolving door may be financially lucrative.