Universite de Mons 1 article published in JoVE Chemistry Uncovering Hidden Dynamics of Natural Photonic Structures Using Holographic Imaging Marina Simovic-Pavlovic1,2, Maja C. Pagnacco3, Dusan Grujic1, Bojana Bokic1, Darko Vasiljevic1, Sébastien Mouchet4,5, Thierry Verbiest6, Branko Kolaric1,7 1Institute of Physics, Photonics Center, University of Belgrade, 2Faculty of Mechanical Engineering, University of Belgrade, 3Institute of Chemistry, Technology and Metallurgy, University of Belgrade, 4School of Physics, University of Exeter, 5Department of Physics & Namur Institute of Structured Matter (NISM), University of Namur, 6Chemistry Department, Laboratory of Molecular Imaging and Photonics, KULeuven, 7Université de Mons The paper is primarily focused on the combined power of optical (linear and nonlinear) and holographic methods used to reveal phenomena at the nanoscale. The results obtained from the biophotonic and oscillatory chemical reactions' studies are given as representative examples, highlighting holography's ability to reveal dynamics at a nanoscale.