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Mattias Krantz is a YouTuber with a penchant for bonkers engineering and musical projects. A few months ago, he went into a wet market looking not for lunch, but for a potential prodigy. Krantz wanted ...

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Octopus is considered a delicacy - grilled, boiled, or fried. But rising demand has consequences, and in several regions of Europe, this intelligent cephalopod is already considered overfished.