Effects on Yellowstone’s elk and vegetation involve other predators, weather, and human influences as well as wolves. When reading a claim about what caused a change, would you prefer a longer headline with caveats built in or a short headline with the same caveats directly underneath? Source: [NPS: Yellowstone wolf restoration](https://www.nps.gov/yell/learn/nature/wolf.htm) Photo: [NPS / Jim Peaco](https://www.nps.gov/features/yell/slidefile/mammals/wolf/Page-4.htm) · [Public domain](https://www.nps.gov/features/yell/slidefile/index.htm)