X-SciTech

Snapshots of a World in Change

February 9, 2011 / 3:24 PM EST / CBS News

The stratospheric ozone layer protects life on Earth by absorbing ultraviolet light. An image of the ozone hole photographed by satellite on September 17, 1979.

The ozone hole photographed by satellite on October 1, 2010.

Drought has taken a toll on crop lands in Southeast Australia during many years this decade. This image was taken in mid-September 2005.

Images of drought conditions in Southeast Australia taken in mid-2009

Global temperatures 1880 - 1889

Global temperatures 2000 - 2009

Changes in the Aral Sea. This image was taken on August 19, 2000.

The Aral Sea photographed on August 26, 2010.

Lake Powell, Nevada, the main supplier of water to Las Vegas. Photographed in 1999.

Water in Lake Powell. Photographed in 2010.

Comparison of sea ice around Antarctica in 1999 and 2010.