We review some new ideas about the quantum corpuscular substructure of black holes, according to which a black hole represents a bound-state of many soft gravitons. We show how this picture explains the known seemingly-mysterious properties, such as entropy, thermality and holography, but also predicts new phenomena not accounted by the standard semi-classical treatment. Among other things, these corpuscular effects shed light on black hole information processing and scrambling as well as on the microscopic picture of black production in high-energy particle scattering. We also discuss applications of analogous corpuscular ideas to the inflationary cosmology and their observational consequences.
(Host: F. Kuehnel)