In science, the 20s saw the manufacture of
pens and metal writing tools in Rome. Major disasters of this decade include a fire in
Rome, and the collapse of a poorly built
amphitheatre in
Fidenae, which killed 20,000 of the 50,000 spectators. In 27,
Christianity was born as a
Jewish sect in
Jerusalem. Geographica, an encyclopedia of geographical knowledge created by
Strabo, was finished no later than AD 23.
Manning (2008) tentatively estimates the world population in AD 20 as 246 million.
Due to lack of reliable demographic data, estimates of the world population in the 1st century vary wildly, with estimates for AD 1 varying from 150[1] to 300[2] million. Demographers typically do not attempt to estimate most specific years in antiquity, instead giving approximate numbers for round years such as AD 1 or AD 200. However, attempts at reconstructing the world population in more specific years have been made, with Manning (2008) tentatively estimating the world population in AD 20 as 246 million.[3]
Greek
geographerStrabo publishes Geography, a work covering the world known to the
Romans and
Greeks at the time of Emperor
Augustus – it is the only such book to survive from the ancient world.[7]
Emperor
Tiberius' son
Drusus Julius Caesar dies.[8] From that point forward, he seems to lose interest in the Empire and occupies himself with the pursuit of pleasure.
July – After being under siege for two months, about 19,000 insurgents under
Liu Xiu defeat 450,000 of Wang Mang's troops in the
Battle of Kunyang, ushering in the fall of Wang Mang's Xin dynasty and restoration of the Han dynasty.[11]
October 6 – Emperor Liu Xuan's forces kill Wang Mang at the end of a three-day siege.
^Haub (1995): "By 1 A.D., the world may have held about 300 million people. One estimate of the population of the Roman Empire, from Spain to Asia Minor, in 14 A.D. is 45 million. However, other historians set the figure twice as high, suggesting how imprecise population estimates of early historical periods can be."
^Kang-i Sun Chang; Stephen Owen, eds. (2010). The Cambridge history of Chinese literature. Cambridge, UK: Cambridge University Press.
ISBN978-0-521-11677-0.
OCLC410227423.
In science, the 20s saw the manufacture of
pens and metal writing tools in Rome. Major disasters of this decade include a fire in
Rome, and the collapse of a poorly built
amphitheatre in
Fidenae, which killed 20,000 of the 50,000 spectators. In 27,
Christianity was born as a
Jewish sect in
Jerusalem. Geographica, an encyclopedia of geographical knowledge created by
Strabo, was finished no later than AD 23.
Manning (2008) tentatively estimates the world population in AD 20 as 246 million.
Due to lack of reliable demographic data, estimates of the world population in the 1st century vary wildly, with estimates for AD 1 varying from 150[1] to 300[2] million. Demographers typically do not attempt to estimate most specific years in antiquity, instead giving approximate numbers for round years such as AD 1 or AD 200. However, attempts at reconstructing the world population in more specific years have been made, with Manning (2008) tentatively estimating the world population in AD 20 as 246 million.[3]
Greek
geographerStrabo publishes Geography, a work covering the world known to the
Romans and
Greeks at the time of Emperor
Augustus – it is the only such book to survive from the ancient world.[7]
Emperor
Tiberius' son
Drusus Julius Caesar dies.[8] From that point forward, he seems to lose interest in the Empire and occupies himself with the pursuit of pleasure.
July – After being under siege for two months, about 19,000 insurgents under
Liu Xiu defeat 450,000 of Wang Mang's troops in the
Battle of Kunyang, ushering in the fall of Wang Mang's Xin dynasty and restoration of the Han dynasty.[11]
October 6 – Emperor Liu Xuan's forces kill Wang Mang at the end of a three-day siege.
^Haub (1995): "By 1 A.D., the world may have held about 300 million people. One estimate of the population of the Roman Empire, from Spain to Asia Minor, in 14 A.D. is 45 million. However, other historians set the figure twice as high, suggesting how imprecise population estimates of early historical periods can be."
^Kang-i Sun Chang; Stephen Owen, eds. (2010). The Cambridge history of Chinese literature. Cambridge, UK: Cambridge University Press.
ISBN978-0-521-11677-0.
OCLC410227423.