Ancient hyperthermal events had critical impacts on the Earth system, and the study of these events plays a crucial role in developing our understanding of Earth system behaviour in response to large-scale climate change. Recent research has shown in particular how hyperthermals significantly affect marine and terrestrial ecosystems, as well as sedimentation patterns in response to changes in weathering and the hydrological cycle. Using the rock record of these events to constrain patterns and magnitudes of climate change through analysis of sedimentological, paleontological and geochemical archives is a central challenge. We invite attendees to present and discuss their recent research on ancient hyperthermals. In particular, we welcome contributions that integrate multi-disciplinary research using sedimentological, palaeontological, geochemical and/or isotopic proxies.