For 27 years, biologist Charlie Crisafulli has been documenting the dramatic return of plant and animal life to Mt. St. Helens after the 1980 eruption. / When Mount St. Helens erupted in 1980, every living thing in the blast zone was buried beneath 300 feet of avalanche debris, covered with steaming mud and, finally, topped with a superheated layer of frothy rock from deep within the earth. Biologist Charlie Crisafulli... see more