Dr Samuel (Sam) Crossman completed his PhD at the Francis Crick Institute in London, UK. His doctoral research used insect models to visualise how morphogen gradients form and scale during rapid tissue growth, ensuring correct cell number and patterning. He joined the Australian Regenerative Medicine Institute (ARMI) in 2019 and is currently a Research Fellow in Dr Jan Kaslin’s group. Alongside his research, he serves as the Academic Manager of AquaCore, ARMI’s world-leading research aquarium. Sam’s research program leverages the unique strengths of the zebrafish system, which is particularly amenable to live imaging, to visualise how neural stem cells are re-activated after injuries to the brain and spinal cord. His work aims to uncover the principles of proliferation in the central nervous system to guide therapies that activate stem cell–driven repair after traumatic brain injury or suppress uncontrolled growth in paediatric brain cancers. Sam also contributes regularly to the university’s third-year Developmental Biology course (DEV3011) and supervises Honours, Masters, and PhD students.