Nature’s Classroom (IMAGE) Champalimaud Centre for the Unknown Caption Climbing fibres, in the form of ivy, wrap around the branches of a Purkinje cell-shaped tree, within the vibrant courtyard of a school populated by mice. The illustration captures the essential role of climbing fibres as teaching signals for associative cerebellar learning. Credit Rita Felix Usage Restrictions No restriction License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.