Former Australian of the Year Alan Mackay-Sim, described as a "titan" of science for his work in stem cell research and brain diseases, has died.
He was 71.
Emeritus Professor Mackay-Sim, who was Australian of the Year in 2017, is probably best known as the scientist who led the world's first human trial using transplanted nasal cells into the spinal cords of three patients with paraplegia.
