Mutationen: Cornelia Hesse-Honegger has been drawing and painting mutated insects since Chernobyl. Her large-format pictures make the invisible visible. For a long time, she was ridiculed for this. When photos of deformed butterflies from Fukushima went around the world, she felt vindicated. In the laboratory of Japanese biologist Joji Otaki on the island of Okinawa, it became obvious: radiation causes mutations.