Anomalous diffusion in vibration-induced spreading of a granular heap S. Kiesgen de Richter, Y. Cheny, A. Gans, M. Jenny, G. Marouazi and M. Delcey EPL, 149 6 (2025) 67002 Published online: 07 April 2025 DOI: 10.1209/0295-5075/adc151