What could you do with the world’s smallest 3D printer? At TEDxVienna Klaus Stadlmann demos his tiny, affordable printer that could someday make customized hearing aids -- or sculptures smaller than a human hair.

Klaus Stadlmann was pursuing his PhD at Vienna's Technical University when a broken laser system gave him some unexpected free time to think. Instead of working on his thesis, he decided to build the world's smallest 3D printer.

source: TED