Rona is a PhD student in the Weizmann institute of Science, in the Biomolecular Sciences department. In her studies, she tries to elucidate a biological function we all share: timekeeping. Far from being a simplistic watch, mammals have elaborate clock mechanisms that allow us to be our own timekeepers. Constantly ticking from the cellular level to the organism level, our biological clocks serve as a great system to test the size and limits of physiological processes. Advancing our knowledge of these issues is key for improvement of life quality and longevity.