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  2. 20th century - Wikipedia

    en.wikipedia.org/wiki/20th_century

    The 20th century began on 1 January 1901 (MCMI), and ended on 31 December 2000 (MM). [1] [2] It was the 10th and last century of the 2nd millennium and was marked by new models of scientific understanding, unprecedented scopes of warfare, new modes of communication that would operate at nearly instant speeds, and new forms of art and entertainment.

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

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

    36th century BC: 35th century BC: 34th century BC: 33rd century BC: 32nd century BC: 31st century BC: 3rd millennium BC · 3000–2001 BC 30th century BC: 29th century BC: 28th century BC: 27th century BC: 26th century BC: 25th century BC: 24th century BC: 23rd century BC: 22nd century BC: 21st century BC: 2nd millennium BC · 2000–1001 BC ...

  4. Key events of the 20th century - Wikipedia

    en.wikipedia.org/wiki/Key_events_of_the_20th_century

    The west went to Britain, France, and the U.S. Post-war Germany would be split between the four, as would Berlin. This division of spheres of influence would set up international diplomacy for the Cold War that would dominate the second half of the century. [85] At the beginning of 1945, Hitler was on his last strings.

  5. 20th century in science - Wikipedia

    en.wikipedia.org/wiki/20th_century_in_science

    Callendar presented evidence that both temperature and the CO 2 level in the atmosphere had been rising over the past half-century, and he argued that newer spectroscopic measurements showed that the gas was effective in absorbing infrared in the atmosphere. Nevertheless, most scientific opinion continued to dispute or ignore the theory.

  6. List of recessions in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_recessions_in_the...

    Bank run on the Seamen's Savings Bank during the panic of 1857. There have been as many as 48 recessions in the United States dating back to the Articles of Confederation, and although economists and historians dispute certain 19th-century recessions, [1] the consensus view among economists and historians is that "the [cyclical] volatility of GNP and unemployment was greater before the Great ...

  7. Cutting out this phrase from a half-century-old law would ...

    www.aol.com/finance/cutting-phrase-half-century...

    Cutting out this phrase from a half-century-old law would save homebuyers $175,000 and help tackle the housing crisis, economists say ... that in 14 states during the early 1970s, at least half ...

  8. History of climate change science - Wikipedia

    en.wikipedia.org/wiki/History_of_climate_change...

    "It is extremely unlikely (<5%) [105] that the global pattern of warming during the past half century can be explained without external forcing (i.e., it is inconsistent with being the result of internal variability), and very unlikely [105] that it is due to known natural external causes alone. The warming occurred in both the ocean and the ...

  9. Estimates of historical world population - Wikipedia

    en.wikipedia.org/wiki/Estimates_of_historical...

    The table starts counting approximately 10,000 years before present, or around 8,000 BC, during the middle Greenlandian, about 1,700 years after the end of the Younger Dryas and 1,800 years before the 8.2-kiloyear event. From the beginning of the early modern period until the 20th century, world population has been characterized by a rapid growth.