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The CPT code revisions in 2013 were part of a periodic five-year review of codes. Some psychotherapy codes changed numbers, for example 90806 changed to 90834 for individual psychotherapy of a similar duration. Add-on codes were created for the complexity of communication about procedures.
Neolithic Subpluvial/African humid period in North Africa, wet 7000–3000: Holocene climatic optimum, or Atlantic in northern Europe (B-S) 6200: 8.2-kiloyear event cold 5000–4100: Older Peron warm and wet, global sea levels were 2.5 to 4 meters (8 to 13 feet) higher than the twentieth-century average 3900: 5.9 kiloyear event dry and cold. 3500
These timelines of world history detail recorded events since the creation of writing roughly 5000 years ago to the present day.. For events from c. 3200 BC – c. 500 see: Timeline of ancient history
A study in 2020 estimated that the average global temperature during the warmest 200 year period of the HCO, around 6,500 years ago, was around 0.7 °C warmer than the mean for nineteenth century AD, immediately before the Industrial Revolution, and 0.3 °C cooler than the average for 2011-2019. [6]
The IPCC Fifth Assessment Report (AR5 WG1) of 2013 examined temperature variations during the last two millennia, and cited the following reconstructions in support of its conclusion that for average annual Northern Hemisphere temperatures, "the period 1983–2012 was very likely the warmest 30-year period of the last 800 years (high confidence ...
Bølling oscillation interstadial (warm and moist period) between the Oldest Dryas and Older Dryas stadials (cool periods) at the end of the Last glacial period. In places where the Older Dryas was not seen, it is known as the Bølling–Allerød warming. c.12,340 BC: c.11,140 BC: Cemetery 117: site of the world's first known battle/war. c ...
Marine Isotope Stage (MIS) 5e, called the Eemian (Ipswichian in Britain) around 124,000–119,000 years ago, was the last interglacial period before the present (Holocene), and compared global mean surface temperatures were at least 2 °C (3.6 °F) warmer.
K is the traditional abbreviation for the Cretaceous Period derived from the German name Kreidezeit, and T is the abbreviation for the Tertiary Period (a historical term for the period of time now covered by the Paleogene and Neogene periods). The event marks the end of the Mesozoic Era and the beginning of the Cenozoic Era. [12] "