Climatic changes since the end of the last ice age form the backdrop for much of human prehistory and are viewed by some as a driving force in the rise and fall of civilizations. The retreat of continental glaciers began in earnest 13 million years ago, with a gradual warming trend that reached its peak around 6,000 years ago during a period known as the Hypsithermal or Holocene climatic optimum. Proxy records, supplemented by historical data in more recent times, suggest six periods of abrupt... więcej
Salem Press Encyclopedia of Science, 2019. 4p.