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  2. List of time periods - Wikipedia

    en.wikipedia.org/wiki/List_of_time_periods

    Mesolithic (Epipaleolithic) – a period in the development of human technology between the Palaeolithic and Neolithic periods. Neolithic – a period of primitive technological and social development, beginning about 10,200 BC in parts of the Middle East, and later in other parts of the world.

  3. History - Wikipedia

    en.wikipedia.org/wiki/History

    The period of events before the invention of writing systems is considered prehistory. [9] "History" is an umbrella term comprising past events as well as the memory, discovery, collection, organization, presentation, and interpretation of these events.

  4. History of life - Wikipedia

    en.wikipedia.org/wiki/History_of_life

    The history of life on Earth traces the processes by which living and extinct organisms evolved, from the earliest emergence of life to the present day. Earth formed about 4.5 billion years ago (abbreviated as Ga, for gigaannum) and evidence suggests that life emerged prior to 3.7 Ga. [1] [2] [3] The similarities among all known present-day species indicate that they have diverged through the ...

  5. Human history - Wikipedia

    en.wikipedia.org/wiki/Human_history

    Human history is the record of humankind from prehistory to the present. Modern humans evolved in Africa around 300,000 years ago and initially lived as hunter-gatherers.They migrated out of Africa during the Last Ice Age and had spread across Earth's continential land except Antarctica by the end of the Ice Age 12,000 years ago.

  6. Modern era - Wikipedia

    en.wikipedia.org/wiki/Modern_era

    From the 1990s, it is more common among historians to refer to the period after the Middle Ages and up to the 19th century as the early modern period. The modern period is today more often used for events from the 19th century until today. The time from the end of World War II (1945) can also be described as being part of contemporary history.

  7. Timeline of aging research - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_aging_research

    The period of world history between the two world wars is a very complicated, difficult and ambiguous time of world history. In many spheres of life, there were ideas that were radical-bold, but not always intelligent, ethical and moral from the point of view of modern knowledge, foundations and norms.

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    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Paleolithic - Wikipedia

    en.wikipedia.org/wiki/Paleolithic

    The Paleolithic or Palaeolithic (c. 3.3 million – c. 11,700 BC) (/ ˌ p eɪ l i oʊ ˈ l ɪ θ ɪ k, ˌ p æ l i-/ PAY-lee-oh-LITH-ik, PAL-ee-), also called the Old Stone Age (from Ancient Greek παλαιός (palaiós) 'old' and λίθος (líthos) 'stone'), is a period in human prehistory that is distinguished by the original development of stone tools, and which represents almost the ...