This animation was made for the ‘Helmholtz Virtual-Institutes’ research program to understand ‘Biological timing in a changing marine environment: clocks and rhythms in pelagic organisms’. The animation visualises life evolving in sync with rhythmic changes in lightness and darkness. The Polar Time program is coordinated by the Alfred Wegener Institute for Polar and Marine Research at the Helmholtz Centre for Environmental Research in Leipzig, Germany. Other participating German universities are Charite Universitatsmedizin Berlin and Carl von Ossietzky University Oldenburg. Foreign partner institutions are University of Padua, Italy and The Australian Antarctic Division (AAD).