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  2. 21st century - Wikipedia

    en.wikipedia.org/wiki/21st_century

    Estimates vary depending on many factors, but the general consensus is that there are between 6,000 and 7,000 languages currently spoken. Between 50% and 90% of those will have become extinct by the year 2100. [55] The top 20 languages spoken by more than 50 million speakers each, are spoken by 50% of the world's population. In contrast, many ...

  3. Human population projections - Wikipedia

    en.wikipedia.org/wiki/Human_population_projections

    Based on this, the UN projected that the world population, 8 billion as of 2023, would peak around the year 2086 at about 10.4 billion, and then start a slow decline, assuming a continuing decrease in the global average fertility rate from 2.5 births per woman during the 2015–2020 period to 1.8 by the year 2100 (the medium-variant projection).

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

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

    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.

  5. Indian numbering system - Wikipedia

    en.wikipedia.org/wiki/Indian_numbering_system

    Sri Lanka used this system in the past but has switched to the English numbering system in recent years. In the Maldives, the term lakh is widely used in official documents and local speech. However, the Westernised Hindu-Arabic numeral system is preferred for higher denominations (such as millions).

  6. 3rd millennium - Wikipedia

    en.wikipedia.org/wiki/3rd_millennium

    Ontario regains control of the Ontario Highway 407 when its 99-year lease expires. [29] 2099 is the maximum year that can be set on computers with BIOS firmware, as well as Microsoft's Windows XP, Windows Vista, Windows 7, Windows 8, and Windows 8.1 operating systems, and Sony's PlayStation 2 and the Nintendo DS gaming platforms.

  7. List of years - Wikipedia

    en.wikipedia.org/wiki/List_of_years

    Help; Learn to edit; Community portal; Recent changes; Upload file; Special pages

  8. The Next 100 Years: A Forecast for the 21st Century - Wikipedia

    en.wikipedia.org/wiki/The_Next_100_Years:_A...

    The Next 100 Years is a 2009 speculative nonfiction book by George Friedman. In the book, Friedman attempts to predict the major geopolitical events and trends of the 21st century. Friedman also speculates in the book on changes in technology and culture that may take place during this period.

  9. Endangered language - Wikipedia

    en.wikipedia.org/wiki/Endangered_language

    Some linguists estimate that between 50% and 90% of them will be severely endangered or dead by the year 2100. [3] The 20 most common languages, each with more than 50 million speakers, are spoken by 50% of the world's population, but most languages are spoken by fewer than 10,000 people. [3]