I for one welcome our new rodent overlords.

Found via Alex Bledsoe:

World's largest beaver dam visible from space.

My favorite part of the article:

Thie said he also found evidence that beavers were repopulating old habitats after being hunted extensively for pelts in past centuries.

"They're invading their old territories in a remarkable way in Canada," he said. "I found huge dams throughout Canada, and beaver colonies with up to 100 of them in a square kilometer."

"They're re-engineering the landscape," he said.

Castor canadensis...