The article discusses research being done on circadian rhythms in Caenorhabditis elegans, a nematode worm. It references the study "Genome-wide Analysis of Light and Temperature-Entrained Circadian Transcripts in C. elegans" by M. Beverly and colleagues in the same issue of the journal "PL0S Biology." Moreover, it relates that extensive knowledge of the circadian rhythms in C. elegans will provide insight on how the physiology and behavior of the worm are affected by the circadian cycles.