Evidence shows Native Americans in New England lived lightly on the land for thousands of years. It wasn't until Europeans arrived that the landscape experienced major human impacts.
The Earth may be entering an era in which natural and human-generated fire together are reshaping the planet.
Decades of wildfire suppression have allowed flammable fuels to pile up in US forests. Scientists and managers say careful use of planned fires can reduce risks of large, out-of-control burns.