Measuring lifespan of the model organism, Caenorhabditis elegans, in a 96-well format enables the screening of large chemical libraries to identify biologically active molecules. Furthermore, the wide availability of these animals with specific genetic mutations allows the identification of genes that influence lifespan, and by extension, age-related biological pathways. Here, we present a method for measuring the lifespan of C. elegans in 96-well microtiter plates to identify and study pharmacologically active molecules that extend lifespan. The format of this assay is readily adapted for automated liquid handling systems and imaging of phenotypes.
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