We introduce far-field fluorescence nanoscopy with ordinaryfluorophores based on switching the majority of them to ametastable dark state, such as the triplet, and calculating theposition of those left or those that spontaneously returned to theground state. Continuous widefield illumination by a single laserand a continuously operating camera yielded dual-color imagesof rhodamine- and fluorescent protein–labeled (living) samples,proving a simple yet powerful super-resolution approach. Fil: Fölling, Jonas. Max Planck Institute for Biophysical Chemistry; Alemania Fil: Bossi, Mariano Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Max Planck Institute for Biophysical Chemistry; Alemania Fil: Bock, Hannes. Max Planck Institute for Biophysical Chemistry; Alemania Fil: Medda, Rebecca. Max Planck Institute for Biophysical Chemistry; Alemania Fil: Wurm, Christian A. Max Planck Institute for Biophysical Chemistry; Alemania Fil: Hein, Birka. Max Planck Institute for Biophysical Chemistry; Alemania Fil: Jakobs, Stefan. Max Planck Institute for Biophysical Chemistry; Alemania Fil: Eggeling, Christian. Max Planck Institute for Biophysical Chemistry; Alemania Fil: Hell, Stefan W. Max Planck Institute for Biophysical Chemistry; Alemania