A man approached a pack of wolves in Yellowstone National Park as visitors watched in horror from far away. Keith Allen Kerbs, who took video of the man, was taking pictures of the five black wolves when the man walked toward the animals. At one point, he was spraying bear spray at the wolves, and eventually managed to escape. The National Park Service said there have been no reports of wolves attacking humans in Yellowstone, but has still advised visitors not to approach them. | CBS News

The water flowing through Yellowstone and the Greater Yellowstone Ecosystem (GYE) is a vital national resource. The headwaters of seven great rivers located here flow from the Continental Divide across the nation to the Pacific Ocean, and the gulfs of California and Mexico. Rain and snow in the mountains and plateaus of the Northern Rockies flow through stream and river networks to provide essential moisture to much of the American West. Together, Yellowstone’s streams and rivers support an abun