http://www.newsweek.com/climate-change-neanderthals-cannibalism-1383342

French researchers say they have found evidence that a group of Neanderthals was forced into cannibalism because their living conditions had become increasinlgy desperate, likely because of rapid climate change.

During the last interglacial period—between 128,000 and 114,000 years ago—the Earth’s climate experienced significant warming, which altered ecosystems and caused a geographical redistribution of plants and animals, according to a study published in the Journal of Archaeological Science.