A growing body of research considers multiple factors to determine what emotions animals feel. Animal emotions, notably pain and suffering, have been a controversial topic among scientists and animal welfare advocates.
Ocean dive documentaries and word-of-mouth may have already told you about the intelligence of octopuses. However, researchers from University of Queensland's Brain Institute say this isn't exactly the case for every octopuses. An MRI scan of the octopods' brain reveals that these clever cephalopods weren't so clever after all, given the unfavorable circumstances.