Explore Earth’s changing atmosphere. Discover how our ever-changing atmosphere transports substances around the globe, protects life from destruction, and supports millions of chemical reactions. Find out how scientists track changes in the atmosphere and why they matter to everything that breathes.
This web site incorporates images and information from the Atmosphere: Change is in the Air exhibition developed by the Smithsonian’s National Museum of Natural History, which was on display at the Museum through November 2006. The exhibition explores the chemistry, properties, and significance of earth’s atmosphere—the invisible envelope that surrounds and affects us all.
Meet Your Atmosphere
Once living things evolved the ability to carry out photosynthesis, they began to remake the atmosphere.
Atmosphere’s hitchhikers can travel thousands of miles, altering air quality and transforming life across continents.