An earthworm invasion is killing Minnesota's ancient goblin fern
Minnesotas Chippewa National Forest is home to most of the worlds population of goblin ferns. But time may be running out for the ancient ferns as surrounding forest floors are destroyed by a voracious invader: Earthworms.
Boundary Waters Canoe Area Wilderness United States Great Lakes Canada General Leech Lake Boulder Lake
Source: startribune.com