The article discusses research by forensic biologist Ildiko Szelecz of the University of Neuchatel and colleagues published in the journal "Forensic Science International" into the use of microorganisms to help determine the time of death of older corpses. Topics include the limited time frame for traditional dating methods, the study's focus on a corpse's effect on testate amoeba populations in surrounding soils, and a longer term study of the method currently under way.