Biological Examples of Circadian Rhythms

  • The Life Cycle and the Noise of Ciadas

  • Population Growth and its Collapse (and regrowth): a Rhythm of Life

    May, Robert, Simple Mathematical Models with Very Complicated Dynamics, Nature, 261 459, (1976) (Lessons of chaos in population biology.)

    May, Robert, Biological Populations with Nonoverlapping Generations: Stable Points, Stable Cycles and Chaos, Science, 186 645, (1974)

  • The Oscillations of the Basic Energy Process in Yeast

    Yeast cells consume oxygen in a fundamental use of energy rather common to all living things. We usually think of yeast consuming sugar and oxygen to form alcohol and other products. Here is an experiment using yeast to observe a biological oscillation.

    Experiments with Yeast Cells

  • The Geometry of Biological Time, A. T. Winfree, Springer-Verlag, N.Y. 1980
  • The Timing of Biological Clocks, A. T. Winfree, Scientific American Library series: no. 19 , W. H. Freeman, 1987