A story of stress and upheaval from the violent twentieth century recorded in stress hormones and tracked by scientists… This isn’t the tale of a war-torn human population, it’s the story of whales harassed and hunted by humans over a period of 150 years. Scientists have gathered earwax plugs from between 1870 and 2016 to study the stress hormones in whales. Stress hormones dramatically increased during times of intensive whaling and decreased when moratoriums were put on whaling in the 70s. However, now factors like pollution, climate change and noise pollution seem to have been causing a slow rise in stress for whales over the last 40 years. The oceans have become a boiling soup of pollution, human activity and higher temperatures, and whales, like many creatures are being turned into refugees of violent industrial human activity. Not only this but whales were shown to have survivor stress because of whaling, meaning that whales who were exposed to the indirect effects of whaling and its constant harassment experienced stress spanning vast distances. This research spells out another chapter in the saga of humans waking up all too slowly to the reality that we share our planet with other beings, who experience a rich range of emotions and can suffer terribly at our hands. Read more about this research here: https://www.smithsonianmag.com/smart-news/ear-wax-tells-story-humans-and-whales-over-last-century-180970840/