Miracle of
14 wolves

In 1995,
wolves were reintroduced into Yellowstone
National Park

Wolves started
to hunt deer

Deer moved to
other places
to avoid
the wolves

And then, plants and trees grew in those places

Trees became quickly taller than before

Soon Beavers came back to the tress to eat

The beavers started to build dams

River channels became narrow

Because of the plant and tree roots, erosion decreased

Rapid streams increased

All the changed geography provided habitats for otters, duck fish amphibians and so on

14wolves created the results which human beings could not effect for 70 years

Small hope can break great despair