Early Relatives of #Primates Lived in High #Arctic 52 Million Years Ago https://www.sci.news/paleontology/ellesmere-island-primates-11602.html

Basal #Primatomorpha colonized #EllesmereIsland (Arctic #Canada) during the hyperthermal conditions of the early #Eocene climatic optimum: Kristen Miller et al. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0280114

No primate relative has ever been found at such extreme latitudes. The #ArcticCircle was much warmer when these close evolutionary cousins of primates lived, but like today was still mostly dark for half of the year.