PT - JOURNAL ARTICLE ED - , TI - Mud Energy AID - 10.1126/science.295.5554.401b DP - 2002 Jan 18 TA - Science PG - 401--401 VI - 295 IP - 5554 4099 - http://science.sciencemag.org/content/295/5554/401.2.short 4100 - http://science.sciencemag.org/content/295/5554/401.2.full SO - Science2002 Jan 18; 295