Global Ecology

7/9/08 updated Asian Air Pollution (2.6 MB pdf) by adding pages on China's air quality in 2008.

11/16/09 updated The Aral Sea (2.7 MB pdf) by adding NASA true colored and Band 7,2,1 images of the Aral Sea acquired during 2009.

The Colorado River: An Ecological Case Study

2/24/09 updated Introduction to the Colorado River (1.9 MB pdf) by adding reference for the Colorado River Basin Map on page 5.

Supplemental Web Papers

2/1/08 updated A Review of Current Research on Human Evolution (2.5 MB pdf) by adding a page on Homo erectus postcranial fossils from Dmanisi, Georgia.