News Sofia Festival Showcases Hydrogen-Powered Robots, History Lectures, and Interactive Theater for Science Education by Anika Shah - Technology April 18, 2026 by Anika Shah - Technology April 18, 2026 Hydrogen-powered robots rolled through the National Palace of Culture in Sofia as families gathered for the first day of the “Found Generation: Return” festival on April 18, 2026. The event, … 0 FacebookTwitterPinterestEmail