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 ...

Octopuses, along with their cephalopod cousins squids and cuttlefish, are considered to be some of the most intelligent invertebrates out there. They have large brains and are able to quickly master a ...