If you understand the power of visual communication to explain, explore, and extend our knowledge of the world around us, then you are invited to enter the 2007 Science & Engineering Visualization Challenge, co-sponsored by the National Science Foundation (NSF) and Science, published by the American Association for the Advancement of Science (AAAS). Entry deadline: 31 May 2007. Awards are expected to be made in the following categories: illustration, photography, informational graphics, interactive media, and non-interactive media. Winning entries will be published in a special section of the September 28, 2007 issue of the journal Science and Science Online and on NSF's website. One winners' entry will appear on the front cover of Science. For more information, see: http://www.nsf.gov/news/special_reports/scivis/