The longevity of Caenorhabditis elegans in soilWayne A. Van Voorhies, Jacqueline Fuchs and Stephen ThomasBiol. Lett. 1, 247–49 (2005). DOI: 10.1098/rsbl.2004.0278Linksdx.doi.orgFull text on PubMed: PMC1626236PMID: 17148178Google Scholar