A study used nerve cells in the genertic model organism of the fruit fly to show how the olfactory capacity of animals ages. Neuronal Circuits and Metabolism, Technical University of Munich. (Image: Ariane Böhm / TUM) Image is illustrating the press release "A neuron can cause a domino effect"; 01.03.2018; https://www.tum.de/nc/en/about-tum/news/press-releases/detail/article/34509/. Free for use in reporting on TU München with the copyright noted.