Can you imagine living in molasses? In a world where it is hard to swim faster than diffusion? How will you know which way to go for food? How should you move to swim?

This is the world of virus, bacterial and eucaryotic cells...

Papers

    E. M. Purcell: Life at low Reynolds number (1977)

    H.C. Berg & E.M. Purcell: Physics of chemisorption (1977)

    H.C. Berg: A Physicist Looks at Bacterial Chemotaxis (1988)