An enormous rock hangs over the alpine tundra. Below, a pocket gopher tunnels, a pika feeds on wildflowers, and a boy rolls over in his tent as he wakes up for the day. Suddenly, the great rock slips and is now poised to fall. Outstanding Science trade Book for Children.
作者簡介：
Jean Craighead George combines lyrical story-telling and expert nature writing to create a vivid introduction to prairie ecology─and a dramatic account of one of nature's most powerful storms.