Extensive hake (fish) skeletal remains in ocean waters too cold for this species to occupy today suggest past ocean temperatures were several degrees warmer. Fish habitats are limited by specific temperature boundaries. In a new study, for example,  Wheeland  and Morgan (2020) found there was a pronounced ocean warming from the 1980s to late 1990s … Continue reading Schooled: Warmth-Sensitive Fish Teach Us They Swam In A 4-5°C Warmer Ocean About 5000 Years Ago