In medieval times, technical knowledge was kept hidden : guilds guarded recipes, processes, and tools and alchemists often wrote in deliberately obscure language. Knowledge was kept secret because it gives economic, professional, or political advantage. Enlightenment and the scientific revolution changed this: methods and results were published so knowledge could be tested, reproduced, and built upon. Open science is safer, scalable and enables completion and economic growth by reducing monopolies. Marin is doing this for AI with the most open effort going on right now: Open data, open experiments , open discussions - an enormous learning opportunity for the world to go from a dark fragmented art to open science.