Why Evolution is True is a blog written by Jerry Coyne, centered on evolution and biology but also dealing with diverse topics like politics, culture, and cats.
World’s largest beaver dam found
Discovered only through satellite imagery, since it’s in an inaccessible part of Wood Buffalo National Park in Alberta, Canada, this bad boy is about 2,790 feet long. More info here. Of course, there may be bigger ones that haven’t yet been found.