The study looked at how often wildfires happened in North American forests from the 1700s to now. They found that in the past, wildfires were less common, especially in the early to mid-1900s. But recently, wildfires have been more frequent in some areas. This change is likely due to changes in the environment and how people manage fires. In the future, forests in eastern Canada might have fewer wildfires if the climate stays the same.