Featured series 
Tag: David Orwig
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Nation & World
Want to know how cold it was in 1490? Ask a tree
Tree rings could hold clues to climate change and forest change.
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Nation & World
The high costs of imported pests
Scientists from Harvard Forest joined a group of experts calling for new regulations and stepped-up surveillance to stem a flood of invasive forest pests whose costs are borne by U.S. homeowners, cities, and towns.
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Nation & World
An invasion of New England
While new species naturally expand to other places and sometimes disrupt the scene when they arrive, the pace of introduction of invasive species has picked up enormously over the past century and a half, stressing and transforming New England forests.
