PT - JOURNAL ARTICLE ED - , TI - Desert Dash AID - 10.1126/science.300.5620.733b DP - 2003 May 02 TA - Science PG - 733--733 VI - 300 IP - 5620 4099 - http://science.sciencemag.org/content/300/5620/733.2.short 4100 - http://science.sciencemag.org/content/300/5620/733.2.full SO - Science2003 May 02; 300