Once considered too polluted for whitefish to thrive, southern Green Bay has suddenly become the only place in Lake Michigan where the fish aren’t collapsing.

The video, recorded inside the train coach, shows the compartment littered with snack packets, water bottles, soiled spoons ...

Live Science spoke with Rob Dunn, an applied ecologist and author of the book "The Call of the Honeyguide," about "mutualism" ...