HUMANPAST.NET

Environment                  Christ Born
Africa
Southwest Asia
Egypt
Indus Valley
China
Europe
South America
Mesoamerica
North America
Other

The Globe

A reconstruction of mean surface temperature in the northern hemisphere over the past two millennia based on high-resolution proxy temperature data (white curve), which retain millennial-scale variability, together with the instrumental temperature record for the northern hemisphere since 1856 (black curve). This combination indicates that late twentieth-century warmth is unprecedented for at least roughly the past two millennia for the northern hemisphere. (145)

Africa

 

Southwest Asia

 

Egypt

 

Indus Valley

 

China

 

Europe

 

South America

 

Mesoamerica

 The Mayan civilization flourished on the immense lowland, limestone shelf forming the Peten-Yucatan peninsula that thrusts out into the Gulf of Mexico. Here the climate is hot, and in the south very wet during the rainy season of May to October. The northern region of the peninsula is much drier, requiring the Maya to excavate and construct thousands of underground, bottle-shaped cisterns. (150)

North America

 In some prehistoric periods the Southwest was wetter than it is today, but for most of the last ten thousand years the Southwest has usually been at least as hot and dry as it is today, and there were short periods of extreme drought. (53)

Other