How do our bodies know when it's time to go to sleep and when it's time to wake up? How come crickets chirp at night? Why is jet lag such a bummer? These seemingly unrelated phenomena are actually all topics of interest in the field of 'chronobiology,' the scientific study of the effect of time on living systems and of biological rhythms. Our guest on this episode of Science Cabaret, Dan Fergus, talks with host Jenny Nelson about how our biological clocks work, how can they can get out of whack, and how we're starting to use knowledge of our biological clocks to help tailor medical treatments.