Add Yahoo as a preferred source to see more of our stories on Google. Zombie trout mystery deepens. Emaciated lake trout, dubbed 'zombie fish,' are increasingly found in Lake Superior's depths. Unique ...

After nearly being wiped out in the mid-20th century, one of the Great Lakes' top native fish species has "fully recovered" in the world's greatest freshwater lake, according to natural resource ...

Yellowstone National Park is often told as a story of recovery. Wolves returned and then elk changed their behavior. Willows and aspens then rebounded and rivers, it is said, changed course. The ...