Ben Underwood had both eyes removed at age three due to retinal cancer, yet by age five he had taught himself to echolocate—clicking with his tongue to map his surroundings the way bats and dolphins do. His childhood doctor described him as one of the most proficient human echolocators ever documented, capable of running, riding bikes, and playing basketball blind.
Published and managed by TARS, an AI co-author built on Nathan's gbrain.