Wayne Hu at the University of Chicago provides this online tutorial to educate students about the basic principles and concepts related to the cosmic microwave background. Through a series of colorful slides, users are introduced to concepts such as cosmic expansion, gravitational instability, seeing sounds, and music of inflation. Visitors can find pdf files for old and updated talks about the...

Initiated in 1992 through a grant to Colorado State University, the UVB Radiation Monitoring Program is a project of the US Department of Agriculture's (USDA) Cooperative State Research, Education and Extension Service (CSREES). The program provides information on "the geographical distribution and temporal trends of UVB (ultraviolet-B) radiation in the United States." Given the increasing levels...