Recently, I learned that the octopus is more intelligent than we suspect. It can open screw-top jars, an astonishing skill if you haven't been shown how and if jars aren't part of your daily life. In Gelsenkirchen (of Taylor Swift fame) am 24. August 2024, the day of the arts festival, no octopus was seen and the exhibits, the donated jars, all kept their lids.