Their return sets off chain of events for ecosystem
(USER SUBMITTED) - After wolves were exterminated in Yellowstone National Park in the early 1900s, a domino of effects from their loss led to an almost complete collapse of the wetlands ecosystem. Now the wolves are back—after 66 were introduced between 1995-1996, the population has reached 200 packs with 1,700 members—and so are the wetlands. More»
