pnas – Thinking Port

How the Black Plague Left Traces in Arctic Ice

July 8, 2019 admin Arctic, black plague, charlemagne, clean air act, climate change, desert research institute, Europe, greenland, ice cores, pnas, proceedings of the national academy of sciences, Russia, Soviet Union, tech-science

Credit to Author: Becky Ferreira| Date: Mon, 08 Jul 2019 19:32:30 +0000

Charlemagne’s iconic silver currency increased industrial lead pollution, while the Black Death caused it to plummet.

Ravens Spread Negative Emotions to Their Friends, Study Finds

May 21, 2019 admin Austria, avian, Birds, corvidae, corvids, emotional contagion, Empathy, negative, pnas, ravens, tech-science, university of vienna

Credit to Author: Becky Ferreira| Date: Tue, 21 May 2019 20:43:12 +0000

“Our findings thus suggest negative emotional contagion in ravens, and in turn advance our understanding of the evolution of empathy.”