Extensive evidence, including global temperature and sea ice data, shows Earth's climate is changing due to human activity.

Rising temperatures are fueled, in part, by declining cloud cover — which could be a potential climate feedback loop.

The world warmed to yet another monthly heat record in January, despite an abnormally chilly United States, a cooling La Nina and predictions of a slightly less hot 2025, according to reports.

Flooding, famine, plagues. Historical documents from diaries to parish registers detail the dramatic impacts of the Little ...