A massive volcanic supereruption is believed to have caused sudden cooling around 74,000 years ago, but its impact on early humans is unclear. Some reports suggest that early humans were sheltered from the worst effects of the eruption, while others indicate that it may have had significant consequences, including disrupting the climate and potentially exposing humans to intense sunburns. The eruption's effects on human evolution and the environment are still being studied, with some warnings of similar future eruptions having devastating consequences.