Water droplets just roll off the surface, cleaning it and, for instance, reducing the growth of fungus spores. The "lotus effect," however, is not limited to plants, as Professor Wilhelm Barthlott of the University of Bonn discovered forty years ago. Extreme water repellency is another strategy used by land-dwelling cyanobacteria (Hassallia byssoidea) to defend themselves from water films and rivals. According to a study published in the journal Frontiers in Plant Science, lead by Barthlott, this is the case. For more info, visit Current Science Daily.