This April 2006 issue of National Geographic features the compelling cover story, 'Quake: The Next Big One.' Published on the 100th anniversary of the devastating 1906 San Francisco earthquake, the article delves into seismic science and preparedness, a topic of significant public interest in the mid-2000s. Other notable features include a haunting look 'Inside Chernobyl,' a report on the resurgence of nuclear power, and the striking landscapes of a revealed Glen Canyon.